Dacu

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Info Box
Dacu-top-view.png Applies to Dacu
Axel-04.png Applies to Axel Ultra
Axel-lite 02.png Applies to Axel Lite
Axel-02.png Applies to AXEL ESATTA
Diva-am335x-overview.png Applies to Diva
Lizard.jpg Applies to Lizard

Introduction

Dacu is a carrier board that can host various DAVE Embedded Systems SOMs, like, for example, the Lizard CPU module.

200px-Emblem-important.svg.png Please note that DACU supports several BOM variants in order to mate with different SOMs or evaluation boards. 200px-Emblem-important.svg.png


Dacu-top-view.png


Dacu's system specifications are the following:

Supported SOMs Axel Ultra
Axel Lite
Diva
Lizard
Power 12-24 V
Serial Ports 1x UART RS232 on DB9
1x UART (RS232/RS422/RS485) or CAN on DB9 (hardware mount options)
1x UART RS232 on pin strip (debug port)
Ethernet 1x Fast Ethernet on RJ45 connector
Display 7" 800x480 LVDS
Storage 1x microSD slot
USB 2x USB 2.0 ports
Audio UDA1345 codec
Buses I2C
SPI
Other On board touch controller
Optional Wi-Fi module
GPIOs

Block Diagram

The following picture shows block diagram of the Dacu carrier board (the version for the Lizard SOM):

Dacu-bd.png

Mechanicals

The following picture shows the mechanical layout of Dacu:

Dacu-top.png

Available options

RS232/RS485/RS422 or CAN

Male or female DB9 connector

Connectors pinout

The following section describes the on-board connectors and their pinout.

Power supply

Power is provided through the JP2 DC Power Jack. Power voltage range is [12-24 V]

CPU module connectors – J1, J2

J1 and J2 are the 140-pin mating connectors for the hosted SOM.

UART1 - J4

J4 is a standard DB9 connector for the RS232 four-wires UART1 port. The following table reports the connector's pinout:

Pin# Pin name Function Notes
1, 4, 6, 9 N.A. N.A. Connected to protection diode array
2 UART_EXT_RX Receive line
3 UART_EXT_TX Transmit line
5 DGND Ground
7 UART_EXT_RTS Request To Send line
8 UART_EXT_CTS Clear To Send line

UART2/CAN - J5

J5 is a standard DB9 male connector for the configurable UART/CAN port. The board provides some hardware mount options for the selection of the UART mode (RS232/RS422/RS485 with auto-direction) or the CAN mode. The board default configuration provides the CAN interface on this port, while the RS232/RS422/RS485 interface is provided as an option to customers who choose the alternative configuration.

Please note that this port can be used to connect a Bluetooth serial adapter powered by the 5V_BT signal.


The following table reports the connector's pinout:

Pin# Pin name RS232 mode RS422 mode RS485 mode CAN mode Notes
1 N.A./Reserved Not connected Not connected Not connected Reserved
2 UART2_A/CAN_M UART2 rx line Not connected Not connected CAN bus low signal
3 UART2_Y/CAN_GND UART2 tx line Inverting driver output Inverting driver output CAN bus GND
4 N.A./Reserved Not connected Not connected Not connected Reserved
5 DGND/CAN_SHIELD Ground Ground Ground CAN bus shield (Optional)
6 N.A./GND Not connected Not connected Not connected Ground (Optional)
7 UART2_Z/CAN_P UART2 Request To Send Noninverting driver output Noninverting driver output CAN bus high signal
8 UART2_B/Reserved UART2 Clear To Send Not connected Not connected Reserved
9 5V_BT/CAN_V+ 5V for bluetooth 5V for bluetooth 5V for bluetooth CAN bus Power (Optional)


Configuration Jumpers J26 e J27

When the board is configured to provide the UART2 interface through the J5 connector, the J26 and J27 jumpers are used to configure the UART mode, as reported below:

Jumper RS232 mode RS422 mode RS485 mode
1-3 open open closed
5-7 open closed open
9-11 open closed open
2-4 open open closed
6-8 open closed closed
10-12 open closed closed
13-15 open open closed
14-16 open open closed

UART3 - J25

J25 is a 10 pin (5x2x2.54mm) header connector. The following table reports the connector's pinout:

Pin# Pin name Function Notes
1, 2, 4, 6, 7, 8, 10 N.A. N.C. Not connected
3 UART3_RX Uart Receive line
5 UART3_TX Uart Transmit line
9 DGND Ground


Ethernet port - J6

J6 is a standard RJ45 connectors connected to the Lizard integrated ethernet controller and PHY.

Pin# Pin name Function Notes
1 ETH_CTTD Center Tap TX
2 ETH_TX+ Eth transmit data +
3 ETH_TX- Eth transmit data -
4 ETH_RX+ Eth receive data +
5 ETH_RX- Eth receive data -
6 ETH_CTRD Center Tap RX
7 DGND Ground
8 ETH_LED2 Eth speed led
9 DGND Ground
10 ETH_LED1 Eth activity led

LCD LVDS connector - J8

J8 is a Hirose (cod. DF13A-20DP-1.25V) double row 1.25mm pitch miniature crimping connector. The following table reports the connector's pinout:

Pin# Pin name Function Notes
1, 2 3.3V_LCD 3.3 V
3, 4, 7, 10, 13, 16, 19 DGND Ground
5 LCD_LVDS_D0- LVDS Data 0 -
6 LCD_LVDS_D0+ LVDS Data 0 +
8 LCD_LVDS_D1- LVDS Data 1 -
9 LCD_LVDS_D1+ LVDS Data 1 +
11 LCD_LVDS_D2- LVDS Data 2 -
12 LCD_LVDS_D2+ LVDS Data 2 +
14 LCD_LVDS_CLK- LVDS clock -
15 LCD_LVDS_CLK+ LVDS clock +
17 LCD_P17 Backlight PWM Connected to LCD_BKLT_PWM
18 LCD_P18 Connected to 5V_LCD
20 LCD_P20 Connected to ground
21, 22 LVDS_SHIELD LVDS shield

LCD Ziff connecor - J7

J7 is an optional connector for an Ampire AM-800480STMQW-TB0 7" 800x480 display. The following table reports the connector's pinout:

Pin# Pin name Function Notes
1, 2, 9, 13, 17, 21, 25, 39, 40 DGND Ground
3 LCD_PCLK LCD Pixel clock
4 LCD_IRQ
5 TSC_YP
6 LCD_R0
7 LCD_R1
8 LCD_R2
10 LCD_R3
11 LCD_R4
12 LCD_R5
14 LCD_G0
15 LCD_G1
16 LCD_G2
18 LCD_G3
19 LCD_G4
20 LCD_G5
22 LCD_B0
23 LCD_B1
24 LCD_B2
26 LCD_B3
27 LCD_B4
28 LCD_B5
29 TSC_YM
30 TSC_XM
31 TSC_XP
32 LCD_DE
33, 34 3.3V_LCD
35, 36, 37 5V_LCD
38 LCD_BKLT_PWM

Touch screen connecor - J28

J28 is a 1.0mm pitch 4-pin ZIF connector. The following table reports the connector's pinout:

Pin# Pin name Function Notes
1 TSC_YP Touch controller Y+
2 TSC_XP Touch controller X+
3 TSC_YM Touch controller Y-
4 TSC_XM Touch controller X-

MicroSD slot - J12

J12 is a Micro-SD card header. The following table reports the connector's pinout:

Pin# Pin name Function Notes
1 MMC1_DAT2
2 MMC1_DAT3
3 MMC1_CMD
4 MMC_3.3V
5 MMC1_CLK
6 DGND
7 MMC1_DAT0
8 MMC1_DAT1
9, 11 SD_SHIELD
10, 12 MMC1_DAT5

SDIO slot (DWM module) - J14

J14 is a Molex dual row 0.50mm pitch SlimStack™ receptacle. This connector is dedicated to the DWM add-on module.The following table reports the connector's pinout:

Pin# Pin name Function Notes
1, 2 5V
3, 4 3.3V
5, 6, 9, 10, 19 DGND
7 MMC2_CMD
8 MMC2_CLK
11 MMC2_DAT0
12, 14, 16, 18, 20, 22 N.C. Not connected
13 MMC2_DAT1
15 MMC2_DAT2
17 MMC2_DAT3
21 UART2_RX Mount option
23 UART2_CTS Mount option
24 BT_F5 Connected to DSS_DATA20/DSI_DY1
25 UART2_TX Mount option
26 BT_F2 Connected to DSS_DATA21/DSI_DX1
27 UART2_RTS Mount option
28 WIFI_IRQ Connected to DSS_DATA22/DSI_DY2
29 BT_EN Connected to DSS_DATA19/DSI_DX0
30 WIFI_EN Connected to DSS_DATA23/DSI_DX2

USB ports - J15

J15 is a stacked, dual port USB Type A connector.

USB port 0 (high speed)

USB port 0 is mapped on the lower USB connector. The following table reports the connector's pinout:

Pin# Pin name Function Notes
B1 5V_USBH_0 5V
B2 USB0_DM USB0 Data -
B3 USB0_DP USB0 Data +
B4 DGND_USBH_0 Ground

USB port 1 (full speed)

USB port 1 is mapped on the higher USB connector. The following table reports the connector's pinout:

Pin# Pin name Function Notes
A1 5V_USBH_1 5V
A2 USBM1 USB0 Data -
A3 USBP1 USB1 Data +
A4 DGND_USBH_1 Ground

I2C bus - J18

J18 is a 8-pin 1.25mm pitch vertical header. The following table reports the connector's pinout:

Pin# Pin name Function Notes
1, 5 DGND Ground
4, 8 3.3V 3.3 V
2 I2C2_SDA I2C #2 data
3 I2C2_SCL I2C #2 clock
6 I2C3_SDA I2C #3 data
7 I2C3_SCL I2C #3 clock

GPIO - J19

J19 is a 8-pin 1.25mm pitch vertical header. The following table reports the connector's pinout:

Pin# Pin name Function Notes
1, 8 DGND Ground
2 MCBSP1_CLKX GPIO
3 MCBSP1_DX GPIO
4 MCBSP1_FSX GPIO
5 MCBSP3_DR GPIO
6 MCBSP3_FSX GPIO
7 MCBSP4_DR GPIO

SPI bus - J20

J20 is a 8-pin 1.25mm pitch vertical header. The following table reports the connector's pinout:

Pin# Pin name Function Notes
1 DGND Ground
2 MCSPI1_CLK SPI1 clock
3 MCSPI1_CS0 SPI1 chip select #0
4 MCSPI1_CS1 SPI1 chip select #1
5 MCSPI1_CS2 SPI1 chip select #2
6 MCSPI1_SOMI SPI1 slave output master input
7 MCSPI1_SIMO SPI1 slave input master output
8 3.3V 3.3 V

Audio - J21

J21 is a 8-pin 1.25mm pitch vertical header. The following table reports the connector's pinout:

Pin# Pin name Function Notes
1 AUD_PW2 Audio amplifier VO 2
2 AUD_PW1 Audio amplifier VO 1
3, 5, 7 DGND Ground
4 LINEOUT_R Audio coded lineout right
6 LINEOUT_L Audio coded lineout left
8 MIC_INPUT Microphone input

JTAG - J16

J16 is a standard 20-pin 2.54mm pitch header connector (bottom side). The following table reports the connector's pinout:

Pin# Pin name Function Notes
1, 2 3.3V 3.3 V
3 JTAG_TRSTn
5 JTAG_TDI
7 JTAG_TMS
9 JTAG_TCK
11 JTAG_RTCK
13 JTAG_TDO
15 JTAG_RST# Connected to MRSTn
4, 6, 8, 10, 12, 14, 16, 18, 20 DGND Ground
17, 19 N.A. Not connected

Versions

As stated before, different versions of DACU board exist in order to support several SOMs and evaluation boards.

The following pages provide some additional information (including schematics and BOMs) related to the mating of DACU with the supported SOMs.

Layout

Mechanical