AXEL Lite SOM/AXEL Lite Hardware/pdf

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General Information[edit | edit source]

AXEL Lite Block Diagram[edit | edit source]

AXEL Lite Block diagram

AXEL Lite TOP View[edit | edit source]

AXEL Lite TOP View

AXEL Lite BOTTOM View[edit | edit source]

AXEL Lite BOTTOM View


Processor and memory subsystem[edit | edit source]

The heart of AXEL Lite module is composed by the following components:

  • i.MX6 SoC application processor
  • Power supply unit
  • DDR memory banks
  • NOR and NAND flash banks
  • SO-DIM 204 pin connector with interfaces signals

This chapter shortly describes the main Axel Lite components.

Processor Info[edit | edit source]

Processor # Cores Clock L2 Cache DDR3 Graphics Acceleration IPU VPU SATA-II
i.MX6 Solo 1 800 MHz
1 GHz		 512 KB 32 bit @ 400 MHz 3D: Vivante GC880
2D: Vivante GC320
Vector: N.A.		 1x 1x No
i.MX6 DualLite 2 850 MHz
1 GHz 		512 KB 64 bit @ 533 MHz 3D: Vivante GC880
2D: Vivante GC320 		1x 1x No
i.MX6 Dual 2 850 MHz
1 GHz
1.2 GHz		 1 MB 64 bit @ 533 MHz 3D: Vivante GC2000
2D: Vivante GC320
Vector: Vivante GC335		 2x 2x Yes
i.MX6 Quad 4 850 MHz
1 GHz
1.2 GHz		 1 MB 64 bit @ 533 MHz 3D: Vivante GC2000
2D: Vivante GC320
Vector: Vivante GC335		 2x 2x Yes
Table: i.MX6 models comparison

RAM memory bank[edit | edit source]

DDR3 SDRAM memory bank is composed by 4x 16-bit width chips resulting in a 64-bit combined width bank. The following table reports the SDRAM specifications:

CPU connection Multi-mode DDR controller (MMDC)
Size min 512 MB
Size max 4 GB
Width 64 bit
Speed 533 MHz

NOR flash bank[edit | edit source]

NOR flash is a Serial Peripheral Interface (SPI) device. This device is connected to the eCSPI channel 1 and by default it acts as boot memory. The following table reports the NOR flash specifications:

CPU connection eCSPI channel 1
Size min 8 MB
Size max 64 MB
Chip select ECSPI1_SS0
Bootable Yes

NAND flash bank[edit | edit source]

On board main storage memory is a 8-bit wide NAND flash connected to the CPU's Raw NAND flash controller. Optionally, it can act as boot peripheral. The following table reports the NAND flash specifications:

CPU connection Raw NAND flash controller
Page size 512 byte, 2 kbyte or 4 kbyte
Size min 128 MB
Size max 2 GB
Width 8 bit
Chip select NANDF_CS0
Bootable Yes

Memory map[edit | edit source]

For detailed information, please refer to chapter 2 “Memory Maps” of the i.MX Applications Processor Reference Manual.

Power supply unit[edit | edit source]

AXEL Lite embeds all the elements required for powering the unit, therefore power sequencing is self-contained and simplified. Nevertheless, power must be provided from carrier board, and therefore users should be aware of the ranges power supply can assume as well as all other parameters.



Hardware versioning and tracking[edit | edit source]

AXEL Lite SOM implements well established versioning and tracking mechanisms:

  • PCB version is copper printed on PCB itself, as shown in Fig. 1
  • serial number: it is printed on a white label, as shown in Fig. 2: see also Product serial number page for more details
  • ConfigID: it is used by software running on the board for the identification of the product model/hardware configuration. For more details, please refer to this link
    • On AXEL Lite SOM ConfigID is stored in these areas of OTP
Fig.1 PCB version


Fig.2 Serial number


Part number composition[edit | edit source]

AXEL Lite SOM module part number is identified by the following digit-code table:

Part number structure Options Description
Family DXL Family prefix code
SOC
  • A: i.MX6Solo 800MHz -40/125°C
  • B: i.MX6Solo 1GHz 0/95°C
  • C: i.MX6 DualLite 1GHz 0/95°C
  • E: i.MX6 Quad 800MHz -40/105°C
  • F: i.MX6 DualPlus 800MHz -40/105°C
  • H: i.MX6 Quad 1GHz -40/105°C
  • I: i.MX6 Quad 1.2GHz -20/105°C
  • M: i.MX6 DualLite 800MHz -40/105°C
 System On Chip definition
NOR SPI
  • 0: 0MB
  • 4: 16MB
  • 5: 32MB
  • 6: 64MB
 Flash memory NOR size
RAM
  • 1: 1GB
  • 2: 2GB
  • 9: 512MB
 DDR memory RAM size
NAND
  • 0: 0MB
  • 1: 1GB NAND SLC
  • 2: 2GB NAND SLC
  • 4: 4GB NAND MLC
  • 7: 128MB NAND SLC
  • 8: 256MB NAND SLC
  • 9: 512MB NAND SLC
 Flash memory NAND size
Boot/bus width
  • 0: SPI NOR/SD1 - 64bit
  • 1: NAND/SD - 32bit
  • 2: SPI NOR/SD - 32 bit
  • 3: NAND/SD - 64 bit
  • 4: NAND/SD - 64 bit NO CAN
  • 6: eMMC/SD3 - 64 bit
  • 7: eMMC/SD3 - 64 bit - NO CAN
 Boot options and RAM Bus width
Temperature range
  • C - Commercial
  • I - Industrial
 For the DAVE Embedded Systems' product Temperature Range classification, please find more information at the page Products Classification
PCB revision
  • 0: first version
  • 1: revision A
  • 2: revision B
  • 3: revision C
 PCB release may change for manufacturing purposes (i.e. text fixture adaptation)
Manufacturing option R: RoHS typically connected to production process and quality
Software Configuration
  • -00: standard factory u-boot pre-programmed
 If customers require custom SW deployed this section should be defined and agreed

Example[edit | edit source]

AXEL Lite SOM code DXLM0213C3R-00

  • DXL - AXEL Lite SOM module
  • M - i.MX6 DualLite 800MHz -40/105°C
  • 0 - NO NOR SPI onboard
  • 2 - 2GB DDR3
  • 1 - 1GB NAND SLC
  • 3 - boot from NAND/SD wuth 64 bit bus width
  • C - Commercial tamperature range (i.e. 0/95°C)
  • 3 - PCB revision C
  • R - RoHS manufacturing process
  • -00 standard factory u-boot pre-programmed

Pinout Table[edit | edit source]

Connectors and Pinout Table[edit | edit source]

Connectors description[edit | edit source]

In the following table are described all available connectors integrated on AXEL Lite SOM:

Connector name Connector Type Notes Carrier board counterpart
J1 SODIMM DDR3 edge connector 204 pin TE Connectivity 2-2013289-1

The dedicated carrier board must mount the mating connector and connect the desired peripheral interfaces according to AXEL Lite pinout specifications. See the images below for reference:

AXEL Lite TOP view
AXEL Lite BOTTOM view

Pinout table naming conventions[edit | edit source]

This chapter contains the pinout description of the AXEL Lite SOM module, grouped in two tables (odd and even pins) that report the pin mapping of the 204-pin SO-DIMM connector.

Each row in the pinout tables contains the following information:

Pin Reference to the connector pin
Pin Name Pin (signal) name on the AxelLite connectors
Internal
connections 		Connections to the components
  • CPU.<x> : pin connected to CPU pad named <x>
  • CAN.<x> : pin connected to the CAN transceiver (TI SN65HVD232)
  • PMIC.<x> : pin connected to the Power Manager IC (NXP MMPF0100)
  • LAN.<x> : pin connected to the LAN PHY (Microchip KSZ9031)
  • NOR.<x>: pin connected to the flash NOR
  • SV.<x>: pin connected to voltage supervisor
  • MTR: pin connected to voltage monitors
Ball/pin # Component ball/pin number connected to signal
Voltage domain The voltage domain the pin belongs to
Type Pin type:
  • I = Input
  • O = Output
  • D = Differential
  • Z = High impedance
  • S = Power supply voltage
  • G = Ground
  • A = Analog signal
Notes Remarks on special pin characteristics
Pin MUX alternative functions Muxes:
  • Pin ALT-0
  • Pin ALT-1
  • Pin ALT-2
  • Pin ALT-3
  • Pin ALT-4
  • Pin ALT-5
  • Pin ALT-6
  • Pin ALT-7
  • Pin ALT-8

Voltage domains[edit | edit source]

Voltage domain Nominal voltage [V] Notes
3.3VIN 3.3 See Operational_characteristics of the SoM wiki page
VCC_ENET_1V8 1.8 Voltage generated by the internal PSU. See Power Supply Unit (PSU) wiki page
AXEL_IO_3V3 3.3 Voltage generated by the internal PSU. See Power Supply Unit (PSU) wiki page
GEN_2V5 2.5 Voltage generated by the internal PSU. See Power Supply Unit (PSU) wiki page

SODIMM ODD pins declaration[edit | edit source]

Pin Pin Name Internal Connections Ball/pin # Voltage

domain

Type Notes Alternative Functions
J2.1 DGND DGND - - G
J2.3 3.3VIN INPUT VOLTAGE - 3.3VIN S
J2.5 3.3VIN INPUT VOLTAGE - 3.3VIN S
J2.7 3.3VIN INPUT VOLTAGE - 3.3VIN S
J2.9 3.3VIN INPUT VOLTAGE - 3.3VIN S
J2.11 DGND DGND - - G
J2.13 ETH0_LED1 LAN.LED1/PME_N1 17 VCC_ENET_1V8 O Internal 10k pull-up to 1.8V

This signal requires voltage level shifters if used at 3.3V

J2.15 ETH0_LED2 LAN.LED2 15 VCC_ENET_1V8 O Internal 10k pull-up to 1.8V

This signal requires voltage level shifters if used at 3.3V

J2.17 DGND DGND - - G
J2.19 ETH0_TXRX0_P LAN.TXRXP_A 2 AXEL_IO_3V3 D
J2.21 ETH0_TXRX0_M LAN.TXRXM_A 3 AXEL_IO_3V3 D
J2.23 ETH0_TXRX1_P LAN.TXRXP_B 5 AXEL_IO_3V3 D
J2.25 ETH0_TXRX1_M LAN.TXRXM_B 6 AXEL_IO_3V3 D
J2.27 ETH0_TXRX2_P LAN.TXRXP_C 7 AXEL_IO_3V3 D
J2.29 ETH0_TXRX2_M LAN.TXRXM_C 8 AXEL_IO_3V3 D
J2.31 ETH0_TXRX3_P LAN.TXRXP_D 10 AXEL_IO_3V3 D
J2.33 ETH0_TXRX3_M LAN.TXRXM_D 11 AXEL_IO_3V3 D
J2.35 DGND DGND - - G
J2.37 SD3_RST CPU.SD3_RST D15 AXEL_IO_3V3 IO Pin ALT-0 SD3_RESET
Pin ALT-1 UART3_RTS_B
Pin ALT-5 GPIO7_IO08
J2.39 SD3_DATA0 CPU.SD3_DATA0 E14 AXEL_IO_3V3 IO Pin ALT-0 SD3_DATA0
Pin ALT-1 UART1_CTS_B
Pin ALT-2 FLEXCAN2_TX
Pin ALT-5 GPIO7_IO04
J2.41 SD3_DATA1 CPU.SD3_DATA1 F14 AXEL_IO_3V3 IO Pin ALT-0 SD3_DATA1
Pin ALT-1 UART1_RTS_B
Pin ALT-2 FLEXCAN2_RX
Pin ALT-5 GPIO7_IO05
J2.43 SD3_DATA2 CPU.SD3_DATA2 A15 AXEL_IO_3V3 IO Pin ALT-0 SD3_DATA2
Pin ALT-5 GPIO7_IO06
J2.45 SD3_DATA3 CPU.SD3_DATA3 B15 AXEL_IO_3V3 IO Pin ALT-0 SD3_DATA3
Pin ALT-1 UART3_CTS_B
Pin ALT-5 GPIO7_IO07
J2.47 SD3_DATA4 CPU.SD3_DATA4 D13 AXEL_IO_3V3 IO Pin ALT-0 SD3_DATA4
Pin ALT-1 UART2_RX_DATA
Pin ALT-5 GPIO7_IO01
J2.49 SD3_DATA5 CPU.SD3_DATA5 C13 AXEL_IO_3V3 IO Pin ALT-0 SD3_DATA5
Pin ALT-1 UART2_TX_DATA
Pin ALT-5 GPIO7_IO00
J2.51 SD3_DATA6 CPU.SD3_DATA6 E13 AXEL_IO_3V3 IO Pin ALT-0 SD3_DATA6
Pin ALT-1 UART1_RX_DATA
Pin ALT-5 GPIO6_IO18
J2.53 SD3_DATA7 CPU.SD3_DATA7 F13 AXEL_IO_3V3 IO Pin ALT-0 SD3_DATA7
Pin ALT-1 UART1_TX_DATA
Pin ALT-5 GPIO6_IO17
J2.55 SD3_CMD CPU.SD3_CMD B13 AXEL_IO_3V3 IO Pin ALT-0 SD3_CMD
Pin ALT-1 UART2_CTS_B
Pin ALT-2 FLEXCAN1_TX
Pin ALT-5 GPIO7_IO02
J2.57 DGND DGND - - G
J2.59 SD3_CLK CPU.SD3_CLK D14 AXEL_IO_3V3 IO Pin ALT-0 SD3_CLK
Pin ALT-1 UART2_RTS_B
Pin ALT-2 UART2_RTS_B
Pin ALT-5 GPIO7_IO03
J2.61 SD2_DATA0 CPU.SD2_DATA0 A22 AXEL_IO_3V3 IO Pin ALT-0 SD2_DATA0
Pin ALT-1 ECSPI5_MISO
Pin ALT-3 AUD4_RXD
Pin ALT-4 KEY_ROW7
Pin ALT-5 GPIO1_IO15
Pin ALT-6 DCIC2_OUT
J2.63 SD2_DATA1 CPU.SD2_DATA1 E20 AXEL_IO_3V3 IO Pin ALT-0 SD2_DATA1
Pin ALT-1 ECSPI5_SS0
Pin ALT-2 EIM_CS2
Pin ALT-3 AUD4_TXFS
Pin ALT-4 KEY_COL7
Pin ALT-5 GPIO1_IO14
J2.65 SD2_DATA2 CPU.SD2_DATA2 A23 AXEL_IO_3V3 IO Pin ALT-0 SD2_DATA2
Pin ALT-1 ECSPI5_SS1
Pin ALT-2 EIM_CS3
Pin ALT-3 AUD4_TXD
Pin ALT-4 KEY_ROW6
Pin ALT-5 GPIO1_IO13
J2.67 SD2_DATA3 CPU.SD2_DATA3 B22 AXEL_IO_3V3 IO Pin ALT-0 SD2_DATA3
Pin ALT-1 ECSPI5_SS3
Pin ALT-2 ECSPI5_SS3
Pin ALT-3 AUD4_TXC
Pin ALT-5 GPIO1_IO12
J2.69 SD2_CMD CPU.SD2_CMD F19 AXEL_IO_3V3 IO Pin ALT-0 SD2_CMD
Pin ALT-1 ECSPI5_MOSI
Pin ALT-2 KEY_ROW5
Pin ALT-3 AUD4_RXC
Pin ALT-5 GPIO1_IO11
J2.71 SD2_CLK CPU.SD2_CLK C21 AXEL_IO_3V3 IO Pin ALT-0 SD2_CLK
Pin ALT-1 ECSPI5_SCLK
Pin ALT-2 KEY_COL5
Pin ALT-3 AUD4_RXFS
Pin ALT-5 GPIO1_IO10
J2.73 DGND DGND - - G
J2.75 SD1_DAT0 CPU.SD1_DAT0 A21 AXEL_IO_3V3 IO Pin ALT-0 SD1_DATA0
Pin ALT-1 ECSPI5_MISO
Pin ALT-2 GPT_CAPTURE1
Pin ALT-5 GPIO1_IO16
J2.77 SD1_DAT1 CPU.SD1_DAT1 C20 AXEL_IO_3V3 IO Pin ALT-0 SD1_DATA1
Pin ALT-1 ECSPI5_SS0
Pin ALT-2 PWM3_OUT
Pin ALT-3 GPT_CAPTURE2
Pin ALT-5 GPIO1_IO17
J2.79 SD1_DAT2 CPU.SD1_DAT2 E19 AXEL_IO_3V3 IO Pin ALT-0 SD1_DATA2
Pin ALT-1 ECSPI5_SS1
Pin ALT-2 GPT_COMPARE2
Pin ALT-3 PWM2_OUT
Pin ALT-4 WDOG1_B
Pin ALT-5 GPIO1_IO19
Pin ALT-6 WDOG1_RESET_B_DEB
J2.81 SD1_DAT3 CPU.SD1_DAT3 F18 AXEL_IO_3V3 IO Pin ALT-0 SD1_DATA3
Pin ALT-1 ECSPI5_SS2
Pin ALT-2 GPT_COMPARE3
Pin ALT-3 PWM1_OUT
Pin ALT-4 WDOG2_B
Pin ALT-5 GPIO1_IO21
Pin ALT-6 WDOG2_RESET_B_DEB
J2.83 SD1_CMD CPU.SD1_CMD B21 AXEL_IO_3V3 IO Pin ALT-0 SD1_CMD
Pin ALT-1 ECSPI5_MOSI
Pin ALT-2 PWM4_OUT
Pin ALT-3 GPT_COMPARE1
Pin ALT-5 GPIO1_IO18
J2.85 SD1_CLK CPU.SD1_CLK D20 AXEL_IO_3V3 IO Pin ALT-0 SD1_CLK
Pin ALT-1 ECSPI5_SCLK
Pin ALT-3 GPT_CLKIN
Pin ALT-5 GPIO1_IO20
J2.87 DGND DGND - - G
J2.89 KEY_COL0/|ECSPI1_SCLK CPU.KEY_COL0 W5 AXEL_IO_3V3 IO Pin ALT-0 ECSPI1_SCLK
Pin ALT-1 ENET_RX_DATA3
Pin ALT-2 AUD5_TXC
Pin ALT-3 KEY_COL0
Pin ALT-4 UART4_TX_DATA
Pin ALT-5 GPIO4_IO06
Pin ALT-6 DCIC1_OUT
J2.91 KEY_ROW0/|ECSPI1_MOSI CPU.KEY_ROW0 V6 AXEL_IO_3V3 IO Pin ALT-0 ECSPI1_MOSI
Pin ALT-1 ENET_TX_DATA3
Pin ALT-2 AUD5_TXD
Pin ALT-3 KEY_ROW0
Pin ALT-4 UART4_RX_DATA
Pin ALT-5 GPIO4_IO07
Pin ALT-6 DCIC2_OUT
J2.93 KEY_COL1/|ECSPI1_MISO CPU.KEY_COL1 U7 AXEL_IO_3V3 IO Pin ALT-0 ECSPI1_MISO
Pin ALT-1 ENET_MDIO
Pin ALT-2 AUD5_TXFS
Pin ALT-3 KEY_COL1
Pin ALT-4 UART5_TX_DATA
Pin ALT-5 GPIO4_IO08
Pin ALT-6 SD1_VSELECT
J2.95 KEY_ROW1/|ECSPI1_SS0 CPU.KEY_ROW1 U6 AXEL_IO_3V3 IO Pin ALT-0 ECSPI1_SS0
Pin ALT-1 ENET_COL
Pin ALT-2 AUD5_RXD
Pin ALT-3 KEY_ROW1
Pin ALT-4 UART5_RX_DATA
Pin ALT-5 GPIO4_IO09
Pin ALT-6 SD2_VSELECT
J2.97 KEY_COL2/|ECSPI1_SS1 CPU.KEY_COL2 W6 AXEL_IO_3V3 IO Pin ALT-0 ECSPI1_SS1
Pin ALT-1 ENET_RX_DATA2
Pin ALT-2 FLEXCAN1_TX
Pin ALT-3 KEY_COL2
Pin ALT-4 ENET_MDC
Pin ALT-5 GPIO4_IO10
Pin ALT-6 USB_H1_PWR_CTL_WAKE
J2.99 KEY_ROW2 CPU.KEY_ROW2 W4 AXEL_IO_3V3 IO Pin ALT-0 ECSPI1_SS2
Pin ALT-1 ENET_TX_DATA2
Pin ALT-2 FLEXCAN1_RX
Pin ALT-3 KEY_ROW2
Pin ALT-4 SD2_VSELECT
Pin ALT-5 GPIO4_IO11
Pin ALT-6 HDMI_TX_CEC_LINE
J2.101 KEY_COL3/|I2C2_SCL CPU.KEY_COL3 U5 AXEL_IO_3V3 IO Internally connected to PMIC I2C interface Pin ALT-0 ECSPI1_SS3
Pin ALT-1 ENET_CRS
Pin ALT-3 HDMI_TX_DDC_SCL
Pin ALT-4 KEY_COL3
Pin ALT-4 I2C2_SCL
Pin ALT-5 GPIO4_IO12
Pin ALT-6 SPDIF_IN
J2.103 KEY_ROW3/|I2C2_SDA CPU.KEY_ROW3 T7 AXEL_IO_3V3 IO Internally connected to PMIC I2C interface Pin ALT-1 ASRC_EXT_CLK
Pin ALT-2 HDMI_TX_DDC_SDA
Pin ALT-3 KEY_ROW3
Pin ALT-4 I2C2_SDA
Pin ALT-5 GPIO4_IO13
Pin ALT-6 SD1_VSELECT
J2.105 KEY_COL4 CPU.KEY_COL4 T6 AXEL_IO_3V3 IO Pin ALT-0 FLEXCAN2_TX
Pin ALT-1 IPU1_SISG4
Pin ALT-2 USB_OTG_OC
Pin ALT-3 KEY_COL4
Pin ALT-4 UART5_RTS_B
Pin ALT-5 GPIO4_IO14
J2.107 KEY_ROW4 CPU.KEY_ROW4 V5 AXEL_IO_3V3 IO Pin ALT-0 FLEXCAN2_RX
Pin ALT-1 IPU1_SISG5
Pin ALT-2 USB_OTG_PWR
Pin ALT-3 KEY_ROW4
Pin ALT-4 UART5_CTS_B
Pin ALT-5 GPIO4_IO15
J2.109 DGND DGND - - G
J2.111 HDMI_CLKN CPU.HDMI_CLKN J5 GEN_2V5 D
J2.113 HDMI_CLKP CPU.HDMI_CLKP J6 GEN_2V5 D
J2.115 HDMI_D0N CPU.HDMI_D0N K5 GEN_2V5 D
J2.117 HDMI_D0P CPU.HDMI_D0P K6 GEN_2V5 D
J2.119 HDMI_D1N CPU.HDMI_D1N J3 GEN_2V5 D
J2.121 HDMI_D1P CPU.HDMI_D1P J4 GEN_2V5 D
J2.123 HDMI_D2N CPU.HDMI_D2N K3 GEN_2V5 D
J2.125 HDMI_D2P CPU.HDMI_D2P K4 GEN_2V5 D
J2.127 HDMI_CEC_IN CPU.HDMI_DDCCEC K2 GEN_2V5 D
J2.129 HDMI_HPD CPU.HDMI_HPD K1 GEN_2V5 D
J2.131 DGND DGND - - G
J2.133 LVDS0_CLK_N CPU.LVDS0_CLK_N V4 GEN_2V5 D
J2.135 LVDS0_CLK_P CPU.LVDS0_CLK_P V3 GEN_2V5 D
J2.137 LVDS0_TX0_N CPU.LVDS0_TX0_N U2 GEN_2V5 D
J2.139 LVDS0_TX0_P CPU.LVDS0_TX0_P U1 GEN_2V5 D
J2.141 LVDS0_TX1_N CPU.LVDS0_TX1_N U4 GEN_2V5 D
J2.143 LVDS0_TX1_P CPU.LVDS0_TX1_P U3 GEN_2V5 D
J2.145 LVDS0_TX2_N CPU.LVDS0_TX2_N V2 GEN_2V5 D
J2.147 LVDS0_TX2_P CPU.LVDS0_TX2_P V1 GEN_2V5 D
J2.149 LVDS0_TX3_N CPU.LVDS0_TX3_N W2 GEN_2V5 D
J2.151 LVDS0_TX3_P CPU.LVDS0_TX3_P W1 GEN_2V5 D
J2.153 DGND DGND - - G
J2.155 LVDS1_CLK_N CPU.LVDS1_CLK_N Y3 GEN_2V5 D
J2.157 LVDS1_CLK_P CPU.LVDS1_CLK_P Y4 GEN_2V5 D
J2.159 LVDS1_TX0_N CPU.LVDS1_TX0_N Y1 GEN_2V5 D
J2.161 LVDS1_TX0_P CPU.LVDS1_TX0_P Y2 GEN_2V5 D
J2.163 LVDS1_TX1_N CPU.LVDS1_TX1_N AA2 GEN_2V5 D
J2.165 LVDS1_TX1_P CPU.LVDS1_TX1_P AA1 GEN_2V5 D
J2.167 LVDS1_TX2_N CPU.LVDS1_TX2_N AB1 GEN_2V5 D
J2.169 LVDS1_TX2_P CPU.LVDS1_TX2_P AB2 GEN_2V5 D
J2.171 LVDS1_TX3_N CPU.LVDS1_TX3_N AA3 GEN_2V5 D
J2.173 LVDS1_TX3_P CPU.LVDS1_TX3_P AA4 GEN_2V5 D
J2.175 DGND DGND - - G
J2.177 EIM_D19 CPU.EIM_D19 G21 AXEL_IO_3V3 IO Pin ALT-0 ECSPI1_SS1
Pin ALT-1 IPU1_DI0_PIN08
Pin ALT-2 IPU2_CSI1_DATA16
Pin ALT-3 UART1_CTS_B
Pin ALT-4 GPIO3_IO19
Pin ALT-5 EPIT1_OUT
Pin ALT-7 EPDC_DATA12
J2.179 EIM_D20 CPU.EIM_D20 G20 AXEL_IO_3V3 IO Pin ALT-0 ECSPI4_SS0
Pin ALT-1 IPU1_DI0_PIN16
Pin ALT-2 IPU2_CSI1_DATA15
Pin ALT-3 UART1_RTS_B
Pin ALT-4 GPIO3_IO20
Pin ALT-5 EPIT2_OUT
J2.181 EIM_D21 CPU.EIM_D21 H20 AXEL_IO_3V3 IO Pin ALT-0 ECSPI4_SCLK
Pin ALT-1 IPU1_DI0_PIN17
Pin ALT-2 IPU2_CSI1_DATA11
Pin ALT-3 USB_OTG_OC
Pin ALT-4 GPIO3_IO21
Pin ALT-5 I2C1_SCL
Pin ALT-6 SPDIF_IN
J2.183 EIM_D22 CPU.EIM_D22 E23 AXEL_IO_3V3 IO Pin ALT-0 ECSPI4_MISO
Pin ALT-1 IPU1_DI0_PIN01
Pin ALT-2 IPU2_CSI1_DATA10
Pin ALT-3 USB_OTG_PWR
Pin ALT-4 GPIO3_IO22
Pin ALT-5 SPDIF_OUT
Pin ALT-7 EPDC_SDCE6
J2.185 EIM_D23 CPU.EIM_D23 D25 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DI0_D0_CS
Pin ALT-1 UART3_CTS_B
Pin ALT-2 UART1_DCD_B
Pin ALT-3 IPU2_CSI1_DATA_EN
Pin ALT-4 GPIO3_IO23
Pin ALT-5 IPU1_DI1_PIN02
Pin ALT-6 IPU1_DI1_PIN14
Pin ALT-7 EPDC_DATA11
J2.187 EIM_D24 CPU.EIM_D24 F22 AXEL_IO_3V3 IO Pin ALT-0 ECSPI4_SS2
Pin ALT-1 UART3_TX_DATA
Pin ALT-2 ECSPI1_SS2
Pin ALT-3 ECSPI2_SS2
Pin ALT-4 GPIO3_IO24
Pin ALT-5 AUD5_RXFS
Pin ALT-6 UART1_DTR_B
Pin ALT-7 EPDC_SDCE7
J2.189 EIM_D25 CPU.EIM_D25 G22 AXEL_IO_3V3 IO Pin ALT-0 ECSPI4_SS3
Pin ALT-1 UART3_RX_DATA
Pin ALT-2 ECSPI1_SS3
Pin ALT-3 ECSPI2_SS3
Pin ALT-4 GPIO3_IO25
Pin ALT-5 AUD5_RXC
Pin ALT-6 UART1_DSR_B
Pin ALT-7 EPDC_SDCE8
J2.191 EIM_D26 CPU.EIM_D26 E24 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DI1_PIN11
Pin ALT-1 IPU1_CSI0_DATA01
Pin ALT-2 IPU2_CSI1_DATA14
Pin ALT-3 UART2_TX_DATA
Pin ALT-4 GPIO3_IO26
Pin ALT-5 IPU1_SISG2
Pin ALT-6 IPU1_DISP1_DATA22
Pin ALT-7 EPDC_SDOED
J2.193 EIM_D27 CPU.EIM_D27 E25 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DI1_PIN13
Pin ALT-1 IPU1_CSI0_DATA00
Pin ALT-2 IPU2_CSI1_DATA13
Pin ALT-3 UART2_RX_DATA
Pin ALT-4 GPIO3_IO27
Pin ALT-5 IPU1_SISG3
Pin ALT-6 IPU1_DISP1_DATA23
Pin ALT-7 EPDC_SDOE
J2.195 EIM_D28 CPU.EIM_D28 G23 AXEL_IO_3V3 IO Pin ALT-0 I2C1_SDA
Pin ALT-1 ECSPI4_MOSI
Pin ALT-2 IPU2_CSI1_DATA12
Pin ALT-3 UART2_CTS_B
Pin ALT-4 GPIO3_IO28
Pin ALT-5 IPU1_EXT_TRIG
Pin ALT-6 IPU1_DI0_PIN13
Pin ALT-7 EPDC_PWR_CTRL3
J2.197 EIM_D29 CPU.EIM_D29 J19 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DI1_PIN15
Pin ALT-1 ECSPI4_SS0
Pin ALT-3 UART2_RTS_B
Pin ALT-4 GPIO3_IO29
Pin ALT-5 IPU2_CSI1_VSYNC
Pin ALT-6 IPU1_DI0_PIN14
Pin ALT-7 EPDC_PWR_WAKE
J2.199 EIM_D30 CPU.EIM_D30 J20 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP1_DATA21
Pin ALT-1 IPU1_DI0_PIN11
Pin ALT-2 IPU1_CSI0_DATA03
Pin ALT-3 UART3_CTS_B
Pin ALT-4 GPIO3_IO30
Pin ALT-5 USB_H1_OC
Pin ALT-7 EPDC_SDOEZ
J2.201 EIM_D31 CPU.EIM_D31 H21 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP1_DATA20
Pin ALT-1 IPU1_DI0_PIN12
Pin ALT-2 IPU1_CSI0_DATA02
Pin ALT-3 UART3_RTS_B
Pin ALT-4 GPIO3_IO31
Pin ALT-5 USB_H1_PWR
Pin ALT-7 EPDC_SDCLK_P
Pin ALT-8 EIM_ACLK_FREERUN
J2.203 DGND DGND - - G

SODIMM EVEN pins declaration[edit | edit source]

Pin Pin Name Internal Connections Ball/pin # Voltage|domain Type Notes Alternative Functions
J2.2 DGND DGND - - G
J2.4 3.3VIN INPUT VOLTAGE - 3.3VIN S
J2.6 3.3VIN INPUT VOLTAGE - 3.3VIN S
J2.8 3.3VIN INPUT VOLTAGE - 3.3VIN S
J2.10 3.3VIN INPUT VOLTAGE - 3.3VIN S
J2.12 DGND DGND - - G
J2.14 PMIC_LICELL PMIC.LICELL 42
  • If this power supply is not used, the pin can be left open.
  • Even if this power supply is not used, NXP recommends to connect a capacitor. A 100nF capacitor is connected on the SoM.
J2.16 CPU_ONOFF CPU.CPU_ONOFF D12
J2.18 BOARD_PGOOD - -
J2.20 BOOT_MODE_SEL BOOT MODE SELECTION This is a pulled-up input. Leave unconnected to select "1". Connect to ground to select "0". For more details, please see also the following pages:
J2.22 CPU_PORn CPU.CPU_PORn C11
J2.24 PMIC_PWRON PMIC.PWRON 56
J2.26 GPIO_0 CPU.GPIO_0 T5 AXEL_IO_3V3 IO Pin ALT-0 CCM_CLKO1
Pin ALT-2 KEY_COL5
Pin ALT-3 ASRC_EXT_CLK
Pin ALT-5 GPIO1_IO00
Pin ALT-6 USB_H1_PWR
Pin ALT-7 SNVS_VIO_5
J2.28 GPIO_1 CPU.GPIO_1 T4 AXEL_IO_3V3 IO Reset_scheme_and_control_signals#Handling_CPU-initiated_software_reset Pin ALT-0 ESAI_RX_CLK
Pin ALT-1 WDOG2_B
Pin ALT-2 KEY_ROW5
Pin ALT-3 USB_OTG_ID
Pin ALT-4 PWM2_OUT
Pin ALT-5 GPIO1_IO01
Pin ALT-6 SD1_CD_B
J2.30 DGND DGND - - G
J2.32 GPIO_2 CPU.GPIO_2 T1 AXEL_IO_3V3 IO Pin ALT-0 ESAI_TX_FS
Pin ALT-2 KEY_ROW6
Pin ALT-5 GPIO1_IO02
Pin ALT-6 SD2_WP
Pin ALT-7 MLB_DATA
J2.34 GPIO_3/I2C3_SCL CPU.GPIO_3 R7 AXEL_IO_3V3 IO Pin ALT-0 ESAI_RX_HF_CLK
Pin ALT-2 I2C3_SCL
Pin ALT-3 XTALOSC_REF_CLK_24M
Pin ALT-4 CCM_CLKO2
Pin ALT-5 GPIO1_IO03
Pin ALT-6 USB_H1_OC
Pin ALT-7 MLB_CLK
J2.36 GPIO_4 CPU.GPIO_4 R6 AXEL_IO_3V3 IO Pin ALT-0 ESAI_TX_HF_CLK
Pin ALT-2 KEY_COL7
Pin ALT-5 GPIO1_IO04
Pin ALT-6 SD2_CD_B
J2.38 GPIO_5 CPU.GPIO_5 R4 AXEL_IO_3V3 IO Pin ALT-0 ESAI_TX2_RX3
Pin ALT-2 KEY_ROW7
Pin ALT-3 CCM_CLKO1
Pin ALT-5 GPIO1_IO05
Pin ALT-6 I2C3_SCL
Pin ALT-7 ARM_EVENTI
J2.40 GPIO_6/I2C3_SDA CPU.GPIO_6 T3 AXEL_IO_3V3 IO Pin ALT-0 ESAI_TX_CLK
Pin ALT-2 I2C3_SDA
Pin ALT-5 GPIO1_IO06
Pin ALT-6 SD2_LCTL
Pin ALT-7 MLB_SIG
J2.42 GPIO_7//FLEXCAN1_H CPU.GPIO_7 R3 AXEL_IO_3V3 IO Hardware mounting option depending on order code|CAN_TX (PHY onboard) or GPIO_7 Pin ALT-0 ESAI_TX4_RX1
Pin ALT-1 ECSPI5_RDY
Pin ALT-2 EPIT1_OUT
Pin ALT-3 FLEXCAN1_TX
Pin ALT-4 UART2_TX_DATA
Pin ALT-5 GPIO1_IO07
Pin ALT-6 SPDIF_LOCK
Pin ALT-7 USB_OTG_HOST_MODE
Pin ALT-8 I2C4_SCL
J2.44 GPIO_8//FLEXCAN1_L CPU.GPIO_8 R5 AXEL_IO_3V3 IO Hardware mounting option depending on order code|CAN_RX (PHY onboard) or GPIO_8 Pin ALT-0 ESAI_TX5_RX0
Pin ALT-1 XTALOSC_REF_CLK_32K
Pin ALT-2 EPIT2_OUT
Pin ALT-3 FLEXCAN1_RX
Pin ALT-4 UART2_RX_DATA
Pin ALT-5 GPIO1_IO08
Pin ALT-6 SPDIF_SR_CLK
Pin ALT-7 USB_OTG_PWR_CTL_WAKE
Pin ALT-8 I2C4_SDA
J2.46 GPIO_9 CPU.GPIO_9 T2 AXEL_IO_3V3 IO Pin ALT-0 ESAI_RX_FS
Pin ALT-1 WDOG1_B
Pin ALT-2 KEY_COL6
Pin ALT-3 CCM_REF_EN_B
Pin ALT-4 PWM1_OUT
Pin ALT-5 GPIO1_IO09
Pin ALT-6 SD1_WP
J2.48 GPIO_16 CPU.GPIO_16 R2 AXEL_IO_3V3 IO Pin ALT-0 ESAI_TX3_RX2
Pin ALT-1 ENET_1588_EVENT2_IN
Pin ALT-2 ENET_REF_CLK
Pin ALT-4 SPDIF_IN
Pin ALT-5 GPIO7_IO11
Pin ALT-6 I2C3_SDA
Pin ALT-7 JTAG_DE_B
J2.50 GPIO_17 CPU.GPIO_17 R1 AXEL_IO_3V3 IO Pin ALT-0 ESAI_TX0
Pin ALT-1 ENET_1588_EVENT3_IN
Pin ALT-2 CCM_PMIC_READY
Pin ALT-3 SDMA_EXT_EVENT0
Pin ALT-4 SPDIF_OUT
Pin ALT-5 GPIO7_IO12
J2.52 GPIO_18 CPU.GPIO_18 P6 AXEL_IO_3V3 IO Pin ALT-0 ESAI_TX1
Pin ALT-1 ENET_RX_CLK
Pin ALT-2 SD3_VSELECT
Pin ALT-3 SDMA_EXT_EVENT1
Pin ALT-4 ASRC_EXT_CLK
Pin ALT-5 GPIO7_IO13
Pin ALT-6 SNVS_VIO_5_CTL
J2.54 GPIO_19 CPU.GPIO_19 P5 AXEL_IO_3V3 IO Pin ALT-0 KEY_COL5
Pin ALT-1 ENET_1588_EVENT0_OUT
Pin ALT-2 SPDIF_OUT
Pin ALT-3 CCM_CLKO1
Pin ALT-4 ECSPI1_RDY
Pin ALT-5 GPIO4_IO05
Pin ALT-6 ENET_TX_ER
J2.56 DGND DGND - - G
J2.58 CSI0_PIXCLK CPU.CSI0_PIXCLK P1 AXEL_IO_3V3 IO Pin ALT-0 IPU1_CSI0_PIXCLK
Pin ALT-5 GPIO5_IO18
Pin ALT-7 ARM_EVENTO
J2.60 CSI0_MCLK CPU.CSI0_MCLK P4 AXEL_IO_3V3 IO Pin ALT-0 IPU1_CSI0_HSYNC
Pin ALT-3 CCM_CLKO1
Pin ALT-5 GPIO5_IO19
Pin ALT-7 ARM_TRACE_CTL
J2.62 CSI0_VSYNC CPU.CSI0_VSYNC N2 AXEL_IO_3V3 IO Pin ALT-0 IPU1_CSI0_VSYNC
Pin ALT-1 EIM_DATA01
Pin ALT-5 GPIO5_IO21
Pin ALT-7 ARM_TRACE00
J2.64 CSI0_DATA_EN CPU.CSI0_DATA_EN P3 AXEL_IO_3V3 IO Pin ALT-0 IPU1_CSI0_DATA_EN
Pin ALT-1 EIM_DATA00
Pin ALT-5 GPIO5_IO20
Pin ALT-7 ARM_TRACE_CLK
J2.66 CSI0_DAT4 CPU.CSI0_DAT4 N1 AXEL_IO_3V3 IO Pin ALT-0 IPU1_CSI0_DATA04
Pin ALT-1 EIM_DATA02
Pin ALT-2 ECSPI1_SCLK
Pin ALT-3 KEY_COL5
Pin ALT-4 AUD3_TXC
Pin ALT-5 GPIO5_IO22
Pin ALT-7 ARM_TRACE01
J2.68 CSI0_DAT5 CPU.CSI0_DAT5 P2 AXEL_IO_3V3 IO Pin ALT-0 IPU1_CSI0_DATA05
Pin ALT-1 EIM_DATA03
Pin ALT-2 ECSPI1_MOSI
Pin ALT-3 KEY_ROW5
Pin ALT-4 AUD3_TXD
Pin ALT-5 GPIO5_IO23
Pin ALT-7 ARM_TRACE02
J2.70 CSI0_DAT6 CPU.CSI0_DAT6 N4 AXEL_IO_3V3 IO Pin ALT-0 IPU1_CSI0_DATA06
Pin ALT-1 EIM_DATA04
Pin ALT-2 ECSPI1_MISO
Pin ALT-3 KEY_COL6
Pin ALT-4 AUD3_TXFS
Pin ALT-5 GPIO5_IO24
Pin ALT-7 ARM_TRACE03
J2.72 CSI0_DAT7 CPU.CSI0_DAT7 N3 AXEL_IO_3V3 IO Pin ALT-0 IPU1_CSI0_DATA07
Pin ALT-1 EIM_DATA05
Pin ALT-2 ECSPI1_SS0
Pin ALT-3 KEY_ROW6
Pin ALT-4 AUD3_RXD
Pin ALT-5 GPIO5_IO25
Pin ALT-7 ARM_TRACE04
J2.74 CSI0_DAT8 CPU.CSI0_DAT8 N6 AXEL_IO_3V3 IO Pin ALT-0 IPU1_CSI0_DATA08
Pin ALT-1 EIM_DATA06
Pin ALT-2 ECSPI2_SCLK
Pin ALT-3 KEY_COL7
Pin ALT-4 I2C1_SDA
Pin ALT-5 GPIO5_IO26
Pin ALT-7 ARM_TRACE05
J2.76 CSI0_DAT9 CPU.CSI0_DAT9 N5 AXEL_IO_3V3 IO Pin ALT-0 IPU1_CSI0_DATA09
Pin ALT-1 EIM_DATA07
Pin ALT-2 ECSPI2_MOSI
Pin ALT-3 KEY_ROW7
Pin ALT-4 I2C1_SCL
Pin ALT-5 GPIO5_IO27
Pin ALT-7 ARM_TRACE06
J2.78 CSI0_DAT10 CPU.CSI0_DAT10 M1 AXEL_IO_3V3 IO Pin ALT-0 IPU1_CSI0_DATA10
Pin ALT-1 AUD3_RXC
Pin ALT-2 ECSPI2_MISO
Pin ALT-3 UART1_TX_DATA
Pin ALT-5 GPIO5_IO28
Pin ALT-7 ARM_TRACE07
J2.80 CSI0_DAT11 CPU.CSI0_DAT11 M3 AXEL_IO_3V3 IO Pin ALT-0 IPU1_CSI0_DATA11
Pin ALT-1 AUD3_RXFS
Pin ALT-2 ECSPI2_SS0
Pin ALT-3 UART1_RX_DATA
Pin ALT-5 GPIO5_IO29
Pin ALT-7 ARM_TRACE08
J2.82 DGND DGND - - G
J2.84 CLK1_N CPU.CLK1_N C7 GEN_2V5 D
J2.86 CLK1_P CPU.CLK1_P D7 GEN_2V5 D
J2.88 CLK2_N CPU.CLK2_N C5 GEN_2V5 D
J2.90 CLK2_P CPU.CLK2_P D5 GEN_2V5 D
J2.92 PCIE_RXN CPU.PCIE_RXN B1 GEN_2V5 D
J2.94 PCIE_RXP CPU.PCIE_RXP B2 GEN_2V5 D
J2.96 PCIE_TXN CPU.PCIE_TXN A3 GEN_2V5 D
J2.98 PCIE_TXP CPU.PCIE_TXP B3 GEN_2V5 D
J2.100 DGND DGND - - G
J2.102 CSI_CLK0M CPU.CSI_CLK0M F4 GEN_2V5 D
J2.104 CSI_CLK0P CPU.CSI_CLK0P F3 GEN_2V5 D
J2.106 CSI_D0M CPU.CSI_D0M E4 GEN_2V5 D
J2.108 CSI_D0P CPU.CSI_D0P E3 GEN_2V5 D
J2.110 CSI_D1M CPU.CSI_D1M D1 GEN_2V5 D
J2.112 CSI_D1P CPU.CSI_D1P D2 GEN_2V5 D
J2.114 CSI_D2M CPU.CSI_D2M E1 GEN_2V5 D
J2.116 CSI_D2P CPU.CSI_D2P E2 GEN_2V5 D
J2.118 CSI_D3M CPU.CSI_D3M F2 GEN_2V5 D
J2.120 CSI_D3P CPU.CSI_D3P F1 GEN_2V5 D
J2.122 DGND DGND - - G
J2.124 DI0_PIN15 CPU.DI0_PIN15 N21 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DI0_PIN15
Pin ALT-1 IPU2_DI0_PIN15
Pin ALT-2 AUD6_TXC
Pin ALT-5 GPIO4_IO17
J2.126 DI0_PIN4 CPU.DI0_PIN4 P25 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DI0_PIN04
Pin ALT-1 IPU2_DI0_PIN04
Pin ALT-2 AUD6_RXD
Pin ALT-5 GPIO4_IO20
J2.128 DI0_PIN3 CPU.DI0_PIN3 N20 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DI0_PIN03
Pin ALT-1 IPU2_DI0_PIN03
Pin ALT-2 AUD6_TXFS
Pin ALT-5 GPIO4_IO19
J2.130 DI0_PIN2 CPU.DI0_PIN2 N25 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DI0_PIN02
Pin ALT-1 IPU2_DI0_PIN02
Pin ALT-2 AUD6_TXD
Pin ALT-5 GPIO4_IO18
J2.132 DI0_DISP_CLK CPU.DI0_DISP_CLK N19 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DI0_DISP_CLK
Pin ALT-1 IPU2_DI0_DISP_CLK
Pin ALT-5 GPIO4_IO16
J2.134 DISP0_DAT0 CPU.DISP0_DAT0 P24 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA00
Pin ALT-1 IPU2_DISP0_DATA00
Pin ALT-2 ECSPI3_SCLK
Pin ALT-5 GPIO4_IO21
J2.136 DISP0_DAT1 CPU.DISP0_DAT1 P22 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA01
Pin ALT-1 IPU2_DISP0_DATA01
Pin ALT-2 ECSPI3_MOSI
Pin ALT-5 GPIO4_IO22
J2.138 DISP0_DAT2 CPU.DISP0_DAT2 P23 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA02
Pin ALT-1 IPU2_DISP0_DATA02
Pin ALT-2 ECSPI3_MISO
Pin ALT-5 GPIO4_IO23
J2.140 DISP0_DAT3 CPU.DISP0_DAT3 P21 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA03
Pin ALT-1 IPU2_DISP0_DATA03
Pin ALT-2 ECSPI3_SS0
Pin ALT-5 GPIO4_IO24
J2.142 DISP0_DAT4 CPU.DISP0_DAT4 P20 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA04
Pin ALT-1 IPU2_DISP0_DATA04
Pin ALT-2 ECSPI3_SS1
Pin ALT-5 GPIO4_IO25
J2.144 DISP0_DAT5 CPU.DISP0_DAT5 P24 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA05
Pin ALT-1 IPU2_DISP0_DATA05
Pin ALT-2 ECSPI3_SS2
Pin ALT-3 AUD6_RXFS
Pin ALT-5 GPIO4_IO26
J2.146 DGND DGND - - G
J2.148 DISP0_DAT6 CPU.DISP0_DAT6 R23 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA06
Pin ALT-1 IPU2_DISP0_DATA06
Pin ALT-2 ECSPI3_SS3
Pin ALT-3 AUD6_RXC
Pin ALT-5 GPIO4_IO27
J2.150 DISP0_DAT7 CPU.DISP0_DAT7 R24 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA07
Pin ALT-1 IPU2_DISP0_DATA07
Pin ALT-2 ECSPI3_RDY
Pin ALT-5 GPIO4_IO28
J2.152 DISP0_DAT8 CPU.DISP0_DAT8 R22 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA08
Pin ALT-1 IPU2_DISP0_DATA08
Pin ALT-2 PWM1_OUT
Pin ALT-3 WDOG1_B
Pin ALT-5 GPIO4_IO29
J2.154 DISP0_DAT9 CPU.DISP0_DAT9 T25 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA09
Pin ALT-1 IPU2_DISP0_DATA09
Pin ALT-2 PWM2_OUT
Pin ALT-3 WDOG2_B
Pin ALT-5 GPIO4_IO30
J2.156 DISP0_DAT10 CPU.DISP0_DAT10 R21 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA10
Pin ALT-1 IPU2_DISP0_DATA10
Pin ALT-5 GPIO4_IO31
J2.158 DISP0_DAT11 CPU.DISP0_DAT11 T23 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA11
Pin ALT-1 IPU2_DISP0_DATA11
Pin ALT-5 GPIO5_IO05
J2.160 DISP0_DAT12 CPU.DISP0_DAT12 T24 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA12
Pin ALT-1 IPU2_DISP0_DATA12
Pin ALT-5 GPIO5_IO06
J2.162 DISP0_DAT13 CPU.DISP0_DAT13 R20 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA13
Pin ALT-1 IPU2_DISP0_DATA13
Pin ALT-3 AUD5_RXFS
Pin ALT-5 GPIO5_IO07
J2.164 DGND DGND - - G
J2.166 DISP0_DAT14 CPU.DISP0_DAT14 U25 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA14
Pin ALT-1 IPU2_DISP0_DATA14
Pin ALT-3 AUD5_RXC
Pin ALT-5 GPIO5_IO08
J2.168 DISP0_DAT15 CPU.DISP0_DAT15 T22 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA15
Pin ALT-1 IPU2_DISP0_DATA15
Pin ALT-2 ECSPI1_SS1
Pin ALT-3 ECSPI2_SS1
Pin ALT-5 GPIO5_IO09
J2.170 DISP0_DAT16 CPU.DISP0_DAT16 T21 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA16
Pin ALT-1 IPU2_DISP0_DATA16
Pin ALT-2 ECSPI2_MOSI
Pin ALT-3 AUD5_TXC
Pin ALT-4 SDMA_EXT_EVENT0
Pin ALT-5 GPIO5_IO10
J2.172 DISP0_DAT17 CPU.DISP0_DAT17 U24 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA17
Pin ALT-1 IPU2_DISP0_DATA17
Pin ALT-2 ECSPI2_MISO
Pin ALT-3 AUD5_TXD
Pin ALT-4 SDMA_EXT_EVENT1
Pin ALT-5 GPIO5_IO11
J2.174 DISP0_DAT18 CPU.DISP0_DAT18 V25 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA18
Pin ALT-1 IPU2_DISP0_DATA18
Pin ALT-2 ECSPI2_SS0
Pin ALT-3 AUD5_TXFS
Pin ALT-4 AUD4_RXFS
Pin ALT-5 GPIO5_IO12
J2.176 DISP0_DAT19 CPU.DISP0_DAT19 U23 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA19
Pin ALT-1 IPU2_DISP0_DATA19
Pin ALT-2 ECSPI2_SCLK
Pin ALT-3 AUD5_RXD
Pin ALT-4 AUD4_RXC
Pin ALT-5 GPIO5_IO13
J2.178 DISP0_DAT20 CPU.DISP0_DAT20 U22 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA20
Pin ALT-1 IPU2_DISP0_DATA20
Pin ALT-2 ECSPI1_SCLK
Pin ALT-3 AUD4_TXC
Pin ALT-5 GPIO5_IO14
J2.180 DISP0_DAT21 CPU.DISP0_DAT21 T20 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA21
Pin ALT-1 IPU2_DISP0_DATA21
Pin ALT-2 ECSPI1_MOSI
Pin ALT-3 AUD4_TXD
Pin ALT-5 GPIO5_IO15
J2.182 DISP0_DAT22 CPU.DISP0_DAT22 V24 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA22
Pin ALT-1 IPU2_DISP0_DATA22
Pin ALT-2 ECSPI1_MISO
Pin ALT-3 AUD4_TXFS
Pin ALT-5 GPIO5_IO16
J2.184 DISP0_DAT23 CPU.DISP0_DAT23 W24 AXEL_IO_3V3 IO Pin ALT-0 IPU1_DISP0_DATA23
Pin ALT-1 IPU2_DISP0_DATA23
Pin ALT-2 ECSPI1_SS0
Pin ALT-3 AUD4_RXD
Pin ALT-5 GPIO5_IO17
J2.186 USB_OTG_VBUS CPU.USB_OTG_VBUS E9
J2.188 USB_H1_VBUS CPU.USB_H1_VBUS D10
J2.190 DGND DGND - - G
J2.192 ENET_RX_ER CPU.ENET_RX_ER W23 VCC_ENET_1V8 IO This pin is 1V8 tolerant (i.e. must be connected to a 1V8 power domain) Pin ALT-0 USB_OTG_ID
Pin ALT-1 ENET_RX_ER
Pin ALT-2 ESAI_RX_HF_CLK
Pin ALT-3 SPDIF_IN
Pin ALT-4 ENET_1588_EVENT2_OUT
Pin ALT-5 GPIO1_IO24
J2.194 ENET_RXD0 CPU.ENET_RXD0 W21 VCC_ENET_1V8 IO This pin is 1V8 tolerant (i.e. must be connected to a 1V8 power domain) Pin ALT-1 ENET_RX_DATA0
Pin ALT-2 ESAI_TX_HF_CLK
Pin ALT-3 SPDIF_OUT
Pin ALT-5 GPIO1_IO27
J2.196 USB_OTG_DN CPU.USB_OTG_DN B6 D
J2.198 USB_OTG_DP CPU.USB_OTG_DP A6 D
J2.200 USB_HOST_DP CPU.USB_HOST_DP E10 D
J2.202 USB_HOST_DN CPU.USB_HOST_DN F10 D
J2.204 DGND DGND - - G

Power and reset[edit | edit source]

Power Supply Unit (PSU) and recommended power-up sequence[edit | edit source]

Implementing correct power-up sequence for i.MX6 processors is not a trivial task because several power rails are involved.

AXEL Lite SOM simplifies this task by embedding all the needed circuitry. The following picture shows a simplified block diagram of PSU/voltage monitoring circuitry:

Power sequence

The PSU is composed of two main blocks:

  • power management integrated circuit
  • additional generic power management circuitry that completes PMIC functionalities

The PSU:

  • generates the proper power-up sequence required by the SOC processor and surrounding memories and peripherals
  • synchronizes the powering up of carrier board in order to prevent back power
  • provides some spare regulated voltages that can be used to power carrier board devices

Power-up sequence[edit | edit source]

The typical power-up sequence is the following:

  1. (optional) PMIC_LICELL is powered
  2. 3.3VIN main power supply rail is powered
  3. CPU_PORn (active-low) is driven low
  4. PMIC activates PMIC_VSNVS power output
  5. PMIC_PWRON signal is pulled-up (unless carrier board circuitry keeps this signal low for any reason)
  6. PMIC transitions from OFF to ON state
  7. PMIC initiates power-up sequence needed by MX6 processor
  8. BOARD_PGOOD signal is raised; this active-high signal indicates that SoM's I/O is powered. This signal can be used to manage carrier board power up sequence in order to prevent back powering (from SoM to carrier board or vice versa). For additional information, please refer to the Note below.
  9. CPU_PORn is released

Note on BOARD_PGOOD usage[edit | edit source]

BOARD_PGOOD is generally used on carrier board to drive loads such as DC/DC enable inputs or switch on/off control signals.

Depending on the kind of such loads, BOARD_PGOOD might not be able to drive them properly. In these cases a simple 2-input AND port can be used to address this issue. The following picture depicts a principle schematic showing this solution.

VDD_SOM denotes the power rail used to power AXEL Lite SoM.

Power good


Real-time clock (RTC) powering[edit | edit source]

Real-time clock is integrated in iMX6 processor. As such, it belongs to SNVS power domain. This domain, in turn, is powered by PMIC, via PMIC_VSNSV rail (see also this page). PMIC integrates a sort of switch. When 3V3VIN voltage is applied, this is used to power SNVS domain. Otherwise energy is drawn from coin cell battery - if any - connected to PMIC_LICELL (for more details please refer to [1]).


Simplified block diagram of Axel Lite RTC powering scheme


It is worth remembering that 3.0V lithium batteries are supported and that PMIC_VSNSV voltage range is 2.4 - 3.6V. When Axel Lite enters RTC mode and 3V3VIN voltage is removed, typical current absorption from PMIC_LICELL pin is about 135uA. This value is relatively high with respect to the typical lithium coin cell battery capacity (10 - 50mAh). It is recommended that system integrator verify that expected battery lifetime satisfies system requirement. If not, the use of an external low-power RTC device should be considered.


Reset scheme and control signals[edit | edit source]

The following picture shows the simplified block diagram of reset scheme and voltage monitoring.

Axel-lite-reset-scheme-BOOT MODE SEL.png

PMIC_VSNVS[edit | edit source]

Some signals that are related to reset circuitry are pulled-up to PMIC_VSNVS. This voltage is generated by PMIC PF0100's VSNVS LDO/Switch and its actual value depends on:

  • voltage applied to PMICS's VIN pin
    • in case of AxelLite this pin is connected to 3.3VIN power rail
  • voltage applied to PMICS's LICELL pin
    • in case of AxelLite this pin is connected to pin 14 of SODIMM connector (PMIC_LICELL)
  • PMIC's VSNVSCTL register configuration.

Hence it is recommended that system designer takes into account these factors in order to properly manage these signals at carrier board level.

For more details please refer to section VSNVS LDO/Switch of MMPF0100 Advance Information document.

CPU_PORn[edit | edit source]

The following devices can assert this active-low signal:

  • PMIC
  • multiple-voltage monitor: this device monitors critical power voltages and triggers a reset pulse in case any of these exhibits a brownout condition

Since SPI NOR flash can be used as boot device, CPU_PORn is connected to this device too. This guarantees it is in a known state when reset signal is released.


Handling CPU-initiated software reset[edit | edit source]

By default, MX6 processor does not assert any external signal when it initiates a software reset sequence. Also default software reset implementation does not guarantee that all processor registers are reset properly.

For these reasons, it is strongly recommended to use a different approach that, in combination with the use of a processor's watchdog timer (WDT), provides a full hardware reset in case a software reset is issued.

This technique is implemented in DESK-MX6-L. At software level, U-Boot and Linux kernel software reset routines make use of processor's WDT #2 to assert the WDOG2_B reset signal. This signal in turn is routed to GPIO_1 pad (MUX mode = 1). At hardware level, this signal is AC-coupled to a 3-state output buffer (please refer to U46 chip of AXEL Lite Evaluation_Kit carrier board), driving PMIC_PWRON.


System boot[edit | edit source]

The boot process begins at Power On Reset (POR) where the hardware reset logic forces the ARM core to begin execution starting from the on-chip boot ROM. The boot ROM:

  • determines whether the boot is secure or non-secure
  • performs some initialization of the system and clean-ups
  • reads the mode pins to determine the primary boot device
  • once it is satisfied, it executes the boot code

Boot options[edit | edit source]

Two options are available related to system boot. They are identified by the Boot field of the ordering code as follows:

  • Boot field = 0 (SOM code: DXLxxxx0xxR): "SPI NOR / SD" option
  • Boot field = 1 (SOM code: DXLxxxx1xxR): "NAND / SD" option

For both options, the selection of the primary boot device is determined by the BOOT_MODE_SEL signal as described in the following sections. BOOT_MODE_SEL is latched when processor reset is released.

In any case, boot process is managed by on-chip boot ROM code that is described in detail in processor's Reference Manual.

SPI NOR / SD option[edit | edit source]

Selection of primary boot device is determined by the BOOT_MODE_SEL signal as follows:

  • BOOT_MODE_SEL = 0
    • primary boot device is SD1
  • boot ROM will try to boot a valid image from the SD card first, and then from the SPI NOR. In case no valid image is found, boot ROM shall enable USB serial download mode automatically
  • BOOT_MODE_SEL = 1 or floating
    • primary boot device is SPI NOR flash connected to eCSPI1
    • in case no valid image is found in NOR flash, boot ROM shall enable USB serial download mode automatically

NAND / SD option[edit | edit source]

Selection of primary boot device is determined by the BOOT_MODE_SEL signal as follows:

  • BOOT_MODE_SEL = 0
    • primary boot device is SD1
    • in case no valid image is found in SD card, boot ROM shall enable USB serial download mode automatically
  • BOOT_MODE_SEL = 1 or floating
    • primary boot device is NAND flash
    • in case no valid image is found in NAND flash, boot ROM shall enable USB serial download mode automatically

Important note for DualLite/Solo based products (manufacture mode management)[edit | edit source]

When Dual Lite or Solo processor are used, GPIO_1 and GPIO_4 signals need to be kept high during bootstrap stage in order to prevent the intervention of bootrom's manufacture mode. Bootstrap stage has to be intended as the time elapsing between the release of hardware reset (CPU_PORn) and the execution of the first instruction of user code (typically this is the reset vector of U-Boot boot loader). Please note that, in case GPIO_1 signal is used to implement software reset circuit, it is high during bootstrap stage by design.


On board JTAG connector[edit | edit source]

JTAG signals are routed to a dedicated connector on the AXEL Lite PCB.

The connector is placed on the top side of the PCB, at the upper-right corner (please see the picture below).

Axellite-jtag-conn.png

J7 - SOM Connector's pinout[edit | edit source]

J7 footprint mates with Samtec FSI-110-03-G-S connector. The following table reports the connector's pinout:

JTAG connector
Pin# Pin name Function ARM-20 JTAG Notes
1 DGND - 4,6,8,10,12,14,16,18,20 For example documented on Lauterbach specification
2 JTAG_TCK - 9 -
3 JTAG_TMS - 7 10K pull-up to 3V3 (BOARD_PGOOD driven signal)
4 JTAG_TDO - 13 10K pull-up to 3V3 (BOARD_PGOOD driven signal)
5 JTAG_TDI - 5 10K pull-up to 3V3 (BOARD_PGOOD driven signal)
6 JTAG_nTRST - 3 (*) 10K pull-up to 3V3 (BOARD_PGOOD driven signal)
7 CPU_PORn - 15 (*) -
8 N.C. - -
9 N.C. - -
10 JTAG_VREF - 1 3V3 (BOARD_PGOOD driven signal)

(*) keep the possibility to be unconnected

Peripherals[edit | edit source]

Peripheral Audio[edit | edit source]

The Audio interface available on AXEL Lite is based on i.MX6 SoC which provides the following subsystems characteristics:

  • Audio codecs are provided by SW, which runs on ARM core, supporting (but not limited to) MP3, WMA, AAC, HE-AAC and Pro10
  • 3x SSIs
  • ESAI (Enhanced Serial Audio Interface)
  • SPDIF Tx/Rx
  • Audmux
  • Audio sample rate conversion accelerator (ASRC)

Description[edit | edit source]

The i.MX6 processor provides SSI Synchronous Serial Interface port that allow to communicate with audio codecs that implement the inter-IC sound bus standard (I2S).

The SSI includes the following features:

  • Independent (asynchronous) or shared (synchronous) transmit and receive sections with separate or shared internal/external clocks and frame syncs, operating in Master or Slave mode
  • Normal mode operation using frame sync
  • 2 sets of Transmit and Receive FIFOs. Each of the four FIFOs is 15x32 bits. The two sets of Tx/Rx FIFOs can be used in Network mode to provide 2 independent channels for transmission and reception (this mode is named as two-channel mode in the following descriptions)
  • Programmable data interface modes such as I2S, LSB, MSB aligned
  • Programmable word length (8, 10, 12, 16, 18, 20, 22 or 24 bits)
  • Programmable I2S modes (Master, Slave or Normal). Maximum audio sampling rate is 196kHz. (Note that maximum sampling rate depends on IPG frequency). Minimum audio sampling rate is 8kHz. Network clock (as an oversampling clock to external device) available as output from SRCK in I2S Master mode
  • AC97 support. Max frame rate is 48kHz. Min frame rate is 8kHz

The processor also provides standard Sony/Philips Digital Interface (SPDIF) stereo transceiver that allows the processor to receive and transmit digital audio.

Pin mapping[edit | edit source]

The Pin mapping is described in the Pinout table section


Peripheral CAN[edit | edit source]

AXEL Lite SOM provides two CAN interfaces (FLEXCAN1 and FLEXCAN2) for supporting distributed realtime control with a high level of reliability.

Description[edit | edit source]

The CAN interface available on AXEL Lite is based on i.MX6 FLEXCAN which is a full implementation of the CAN protocol specification, which supports both standard and extended message frames.

The FLEXCAN module implements:

  • the CAN protocol version 2.0B
  • Standard data and remote frames
  • Extended data and remote frames
  • Zero to eight bytes data length
  • Programmable bit rate up to 1 Mb/sec
  • Content-related addressing
  • 64 Message Buffers

Pin mapping[edit | edit source]

The Pin mapping is described in the Pinout table section


Peripheral Ethernet[edit | edit source]

The AXEL Lite i.MX6 SOC ENET implements a triple-speed 10/100/1000/1000-Mbit/s ethernet MAC interface.

Description[edit | edit source]

The Ethernet interface available on AXEL Lite is based on i.MX6 ethrnet MAC and ax external ethernet PHY.

The Ethernet MAC supports the following standards and features:

  • compliant with the IEEE802.3-2002 standard
  • compatibility with half- or full-duplex 10/100-Mbit/s and full-duplex gigabit1 Ethernet LANs
  • compliant with the AMD magic packet detection with interrupt for node remote power management
  • hardware acceleration block to optimize the performance of network controllers providing TCP/IP, UDP, and ICMP protocol services

Known limitations[edit | edit source]

According to i.MX6 chip errata ERR004512, the ethernet performances are limited to 470Mbps: 

ERR004512 ENET: 1 Gb Ethernet MAC (ENET) system limitation

Description:
The theoretical maximum performance of 1 Gbps ENET is limited to 470 Mbps (total for Tx and Rx). The actual measured performance in an optimized environment is up to 400 Mbps.

Projected Impact:Minor. 
Limitation of ENET throughput to around 400 Mbps. ENET remains fully compatible to 1Gb standard in terms of protocol and physical signaling. If the TX and RX peak data rate is higher than 400 Mbps, there is a risk of ENET RX FIFO overrun

Pin mapping[edit | edit source]

The Pin mapping is described in the Pinout table section


Peripheral HDMI[edit | edit source]

HDMI (High-Definition Multimedia Interface) is a compact audio/video interface for transmitting uncompressed digital video data and uncompressed/compressed digital audio data.

HDMI connects digital audio/video sources-such as set-top boxes, Blu-ray Disc players, personal computers (PCs), video game consoles, and AV receivers to compatible digital audio devices, computer monitors, and digital televisions.

Description[edit | edit source]

The HDMI interface available on AXEL Lite is based on i.MX6 SoC.

The HDMI port supports the following standards and features:

  • High-Definition Multimedia Interface Specification Version 1.4a
  • Support for up to 1080p at 60Hz and 720p/1080i at 120Hz HDTV display resolutions
  • Support 3D video mode up to 270MHz

Pin mapping[edit | edit source]

The Pin mapping is described in the Pinout table section


Peripheral LVDS[edit | edit source]

The LVDS Display Bridge (LDB) connects the IPU (Image Processing Unit) to an External LVDS Display Interface.

The purpose of the LDB is to support flow of synchronous RGB data from the IPU to external display devices through the LVDS interface.

This support covers all aspects of these activities:

  • Connectivity to relevant devices - Displays with LVDS receivers
  • Arranging the data as required by the external display receiver and by LVDS display standards
  • Synchronization and control capabilities

Description[edit | edit source]

The LVDS interface available on AXEL Lite is based on i.MX6 SoC and provides two LVDS interfaces.

The LVDS ports may be used as follows:

  • Single channel output
  • Dual channel output (one input source, two channels outputs for two displays)
  • Split channel output (one input source, splitted to 2 channels on output)
  • Separate 2 channel output (2 input sources from IPU)

The output LVDS port complies to the EIA-644-A standard.

Pin mapping[edit | edit source]

The Pin mapping is described in the Pinout table section


Peripheral MIPI[edit | edit source]

The CSI-2 Host Controller is a digital core that implements all protocol functions defined in the MIPI CSI-2 Specification, providing an interface between the System and the MIPI D-PHY, allowing the communication with a MIPI CSI-2 compliant Camera Sensor

Description[edit | edit source]

The MIPI interface available on AXEL Lite is based on i.MX6 SoC and support the following features:

  • Compliant with MIPI Alliance Standard for Camera Serial Interface 2 (CSI-2), Version 1.00 - 29 November 2005
  • Interface with MIPI D-PHY following PHY Protocol Interface (PPI), as defined in MIPI Alliance Specification for D-PHY, Version 1.00.00 - 14 May 2009
  • Supports up to 2 (S/DL) and 4 (D/Q) D-PHY Rx Data Lanes
  • Dynamically configurable multi-lane merging
  • Long and Short packet decoding
  • Timing accurate signaling of Frame and Line synchronization packets
  • Support for several frame formats such as:
    • General Frame or Digital Interlaced Video with or without accurate sync timing
    • Data type (Packet or Frame level) and Virtual Channel interleaving
  • 32-bit Image Data Interface delivering data formatted as recommended in CSI-2 Specification
  • Supports all primary and secondary data formats:
    • RGB, YUV and RAW color space definitions
    • From 24-bit down to 6-bit per pixel
    • Generic or user-defined byte-based data types
  • Error detection and correction: PHY, Packet, Line, Frame

Camera ports[edit | edit source]

The MIPI CSI-2 Serial port supports the following standards and features:

i.MX 6Solo/6DualLite[edit | edit source]

  • Supporting from 80 Mbps to 1 Gbps speed per data lane
  • CSI-2 Receiver core can manage one clock lane and up to two lanes

i.MX 6Dual/6Quad[edit | edit source]

  • Support up to 1Gbps per lane in 1/2/3-lane mode and up to 800 Mbps/lane in 4-lane mode
  • CSI-2 Receiver core can manage one clock lane and up to four data lanes

Pin mapping[edit | edit source]

The Pin mapping is described in the Pinout table section


Peripheral SDIO[edit | edit source]

AXEL Lite SOM provides up to three SDIO interfaces; due to PINMUX restrcitions and usa of the NAND controller onboard, a typical usage on AXEL Lite SOM is the following one:

  • SD1 configured in 4-bit mode and used as boot device (with BOOT_SEL)
  • SD2 configured in 4-bit mode
  • SD3 configured in 8-bit mode: a typical connection for this interface is forx interfacing an external eMMC storage device

Description[edit | edit source]

The SDIO interface available on AXEL Lite is based on i.Mx6 SoC.

The SDIO port supports the following standards and features:

  • 1-bit or 4-bit transfer mode specifications for SD and SDIO cards up to UHS-I SDR-104 mode (104 MB/s max)
  • 1-bit, 4-bit, or 8-bit transfer mode specifications for MMC cards up to 52 MHz in both SDR and DDR modes (104 MB/s max)
  • Compatible with SD Memory, miniSD Memory, SDIO, miniSDIO, SD Combo, MMC and MMC RS, embedded MMC and embedded SD cards
  • Up to 200 Mbps data transfer for SD/SDIO cards using 4 parallel data lines
  • Up to 416 Mbps data transfer for MMC cards using 8 parallel data lines
  • Up to 832 Mbps data transfer for MMC/SD cards using 8 parallel data lines in DDR mode
  • Dual internal 32x32-bit FIFOs

Pin mapping[edit | edit source]

The Pin mapping is described in the Pinout table section


Peripheral UART[edit | edit source]

Universal Asynchronous Receiver/Transmitter (UART) provides serial communication capability with external devices through a level converter like RS-232 or RS-485.

Description[edit | edit source]

The UART interface available on AXEL Lite is based on i.MX6 SoC.

The UART ports support the following standards and features:

  • One of the five UARTs (UART1) supports 8-wire while others four supports 4-wire
  • High-speed TIA/EIA-232-F compatible, up to 4.0 Mbit/s
  • Serial IR interface low-speed, IrDA-compatible (up to 115.2 Kbit/s)
  • 9-bit or Multidrop mode (RS-485) support (automatic slave address detection)
  • 7 or 8 data bits for RS-232 characters, or 9 bit RS-485 format
  • 1 or 2 stop bits
  • Programmable parity (even, odd, and no parity)
  • Hardware flow control support for request to send (RTS_B) and clear to send (CTS_B) signals
  • RS-485 driver direction control via CTS_B signal
  • Auto baud rate detection (up to 115.2 Kbit/s)
  • Two independent, 32-entry FIFOs for transmit and receive

Pin mapping[edit | edit source]

The Pin mapping is described in the Pinout table section


Peripheral USB host[edit | edit source]

Universal Serial Bus (USB) is an industry standard that establishes specifications for cables and connectors and protocols for connection, communication and power supply (interfacing) between computers, peripherals and other computers.

The USB controller block provides high performance USB functionality that conforms to the Universal Serial Bus Specification, Rev. 2.0

Description[edit | edit source]

The two USB interface available on AXEL Lite are based on iMX6 SoC. The USB1 port is connected to the USB 2.0 Controller Core 1 which is a High-Speed/Full-Speed/Low-Speed Host-Only core.

The USB1 host port support the following standards and features:

  • USB 2.0 (480 Mbps)
  • HS host with integrated High Speed Phy

Pin mapping[edit | edit source]

The Pin mapping is described in the Pinout table section


Peripheral USB OTG[edit | edit source]

Universal Serial Bus (USB) is an industry standard that establishes specifications for cables and connectors and protocols for connection, communication and power supply (interfacing) between computers, peripherals and other computers.

The USB controller block provides high performance USB functionality that conforms to the Universal Serial Bus Specification, Rev. 2.0

Description[edit | edit source]

The two USB interface available on AXEL Lite are based on iMX6 SoC. The USB2 port is connected to the USB 2.0 Controller Core 0 which is an OTG controller core that can operate in Host mode and Device (Peripheral) mode

The USB2 host port support the following standards and features:

  • USB 2.0 (480 Mbps)
  • HS host with integrated High Speed Phy
  • Hardware support for OTG signaling, session request protocol, and host negotiation protocol
  • Up to 8 bidirectional endpoints

Pin mapping[edit | edit source]

The Pin mapping is described in the Pinout table section


Peripheral PCI Express[edit | edit source]

Description[edit | edit source]

The PCI Express interface available on AXEL Lite is based on i.MX6 SoC and supports the following standards and features:

  • PCI Express Base Specification, Revision 2.0 (including legacy 2.5-Gbps support) @ 5.0 Gbps data rate
  • PCI Express Base Specification, Revision 1.1 @ 2.5Gbps data rate

PHY features[edit | edit source]

  • 5 Gbps data transmission rate
  • Integrated PHY includes transmitter, receiver and PLL
  • Programmable RX equalization
  • 5Gb/s PCIe Gen 2 and 2.5Gb/s PCIe Gen 1.1 test modes

Pin mapping[edit | edit source]

The Pin mapping is described in the Pinout table section


Peripheral GPIO[edit | edit source]

The GPIO general-purpose input/output peripheral provides dedicated general-purpose pins that can be configured as either inputs or outputs.

Description[edit | edit source]

The GPIOs interface available on AXEL Lite is based on i.MX6 SoC.

The GPIO functionality is provided through registers, an edge-detect circuit, and interrupt generation logic.

When configured as an output, it is possible to write to an internal register to control the state driven on the output pin. When configured as an input, it is possible to detect the state of the input by reading the state of an internal register. In addition, the GPIO peripheral can produce CORE interrupts.

Pin mapping[edit | edit source]

The Pin mapping is described in the Pinout table section


Peripheral Real Time Clock[edit | edit source]

Description[edit | edit source]

The Real Time Clock interface available on AXEL Lite is based on NXP MMPF0100 PMIC.

The Real Time Clock is kept operative through the AXEL Lite PMIC_LICELL pin (J2.14): the LICELL pin provides for a connection of a coin cell backup battery or a “super” capacitor.

A small capacitor should be placed from LICELL to ground under all circumstances.

For more information about PMIC RTC functionality, please refer to the MMPF0100 datasheet.

Powering[edit | edit source]

Real-time clock is integrated in iMX6 processor. As such, it belongs to SNVS power domain. This domain, in turn, is powered by PMIC, via PMIC_VSNSV rail (see also this page). PMIC integrates a sort of switch. When 3V3VIN voltage is applied, this is used to power SNVS domain. Otherwise energy is drawn from coin cell battery - if any - connected to PMIC_LICELL (for more details please refer to [1]).


Simplified block diagram of AXEL Lite RTC powering scheme


It is worth remembering that 3.0V lithium batteries are supported and that PMIC_VSNSV voltage range is 2.4 - 3.6V. When AXEL Lite enters RTC mode and 3V3VIN voltage is removed, typical current absorption from PMIC_LICELL pin is about 135uA. This value is relatively high with respect to the typical lithium coin cell battery capacity (10 - 50mAh). It is recommended that system integrator verify that expected battery lifetime satisfies system requirement. If not, the use of an external low-power RTC device should be considered.

Pin mapping[edit | edit source]

The Pin mapping is described in the Pinout table section


Peripheral Watchdog[edit | edit source]

The Watchdog Timer (WDOG) protects against system failures by providing a method by which to escape from unexpected events or programming errors.

Description[edit | edit source]

By default, the Watchdog Timer of iMX6 SOC is internally used on AXEL Lite for the CPU-initiated software reset function.

For more details see the reset scheme and control signals section.

The Watchdog timer supports the following features:

  • Configurable timeout counter with timeout periods from 0.5 to 128 seconds which, after timeout expiration, result in the assertion of WDOG_RESET_B_DEB reset signal
  • Time resolution of 0.5 seconds
  • Power down counter with fixed timeout period of 16 seconds, which if not disabled after reset will assert WDOG_B signal low

Pin mapping[edit | edit source]

The Pin mapping is described in the Pinout table section

Electrical, Thermal and Mechanical Features[edit | edit source]

Operational characteristics[edit | edit source]

Maximum ratings[edit | edit source]

Parameter Min Typ Max Unit
Main power supply voltage -0.3 3.3 3.6 V

Recommended ratings[edit | edit source]

Parameter Min Typ Max Unit
Main power supply voltage 3.135 3.3 3.465 V

Power consumption[edit | edit source]

Providing theoretical maximum power consumption value would be useless for the majority of system designers building their application upon AXEL Lite module. Practically speaking, these figures would be of no help when it comes to size power supply unit or to perform thermal design of real systems.

Instead, several configurations have been tested in order to provide figures that are measured on real-world use cases.

Please note that AXEL Lite platform is so flexible that it is virtually impossible to test for all possible configurations and applications on the market. The use cases here presented should cover most of real-world scenarios. However actual customer's application might require more power than values reported here or customer's use case may be differ significantly with respect to the ones here considered.

Therefore, application-specific requirements have always to be taken into consideration in order to size power supply unit and to implement thermal management properly.

Use cases results[edit | edit source]

Measurements have been performed on the AXEL Lite SOM under test is equipped with:

  • i.MX6 DualLite (p.n. MCIMX6U7CVM08AC)
  • 1 GB DDR3L SDRAM
  • 1 GB NAND

1 Gbps Ethernet link has been always active during the test.

The table below reports the power consumption measurements for the considered use cases.

Checkpoint Power (mW)
U-boot prompt 2370
Linux prompt 1610
Stress App test (*) 5915

(*) Stressful Application Test: https://github.com/stressapptest/stressapptest


Thermal management[edit | edit source]

The AXEL Lite SOM is designed to support the maximum available temperature range declared by the manufacturer.

The customer shall define and conduct a reasonable number of tests and verification in order to qualify the DUT capabilities to manage the heat dissipation.

Any heatsink, fan etc shall be defined case by case.

DAVE Embedded Systems' team is available for any additional information, please contact sales@dave.eu.

Software thermal protection[edit | edit source]

In DESK-MX6-L, two software thermal protection mechanisms are implemented. Both are based on the processor's temperature sensor. It is worth remembering that maximum junction temperature (also denoted as Tj in the rest of the document) is:

  • 95°C for commercial parts
  • 105°C for extended commercial and industrial parts
  • 125°C for automotive parts.

U-Boot[edit | edit source]

At U-Boot level, automatic boot procedure is halted until Tj is smaller than (following temperatures might seem excessively low but they take into account the intrinsic poor precision of the temperature sensor to provide a reasonable safe margin):

  • 80°C for commercial parts
  • 90 for extended commercial and industrial parts
  • 110°C for automotive parts.

Linux kernel[edit | edit source]

At Linux level, a more sophisticated protection mechanism is implemented. Please refer to the following sections for more details.

The default temperature thresholds depend on the silicon grade, as follows:

  • for commercial parts
    • passive threshold: 85°C
    • critical threshold: 90°C
  • for extended commercial and industrial parts
    • passive threshold: 95°C
    • critical threshold: 100°C
  • for automotive parts
    • passive threshold: 115°C
    • critical threshold: 120°C.

Practically speaking, for DESK-MX6-L this mechanism makes use of two different thresholds, denoted as trip_point0 (also known as passive threshold) and trip_point1 (also known as critical threshold.

When Tj reaches trip_point0, Linux kernel scales down processor frequency: 

System is too hot. GPU3D will work at 1/64 clock.

If Tj reaches trip_point1, a complete shutdown is triggered: 

thermal thermal_zone0: critical temperature reached(100 C),shutting down

By default, temperature thresholds are set up as follows:

  • trip_point0: 85°C
  • trip_point1: 100°C.

Trip point thresholds can be accessed via sysfs interface from user space. The following example shows how to read the values of the trip points: 

root@axel-lite:~# cat /sys/devices/virtual/thermal/thermal_zone0/trip_point_0_temp
85000
root@axel-lite:~# cat /sys/devices/virtual/thermal/thermal_zone0/trip_point_1_temp
100000

This example shows how to set trip points 0 and 1 to 95°C and 100°C respectively: 

echo 95000 > /sys/class/thermal/thermal_zone0/trip_point_0_temp
echo 100000 > /sys/class/thermal/thermal_zone0/trip_point_1_temp
200px-Emblem-important.svg.png

Please note that

  • it is possible to set up trip points greater than the maximum junction temperature indicated by manufacturer datasheet
  • exceeding maximum junction temperature indicated by manufacturer datasheet may cause permanent damage

To read current processor temperature please issue this command (reported temperature is 36.676°C in the example): 

root@axel-lite:~# cat /sys/class/thermal/thermal_zone0/temp
36676

For more details about this functionality, please refer to Documentation/thermal/sysfs-api.txt in the kernel sources.


Mechanical specifications[edit | edit source]

This chapter describes the mechanical characteristics of the AXEL Lite module.

Board Layout[edit | edit source]

The following figure shows the physical dimensions of the AXEL Lite module:

Axellite-top-view.png

Connectors[edit | edit source]

The following figure shows the AXEL Lite connector layout:

Axellite-bottom-view.png

CAD drawings[edit | edit source]

3D drawings[edit | edit source]


  1. ↑ 1.0 1.1 NXP, MMPF0100 - PF0100 Data sheet: Advance Information
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