Connectors, buttons and switches (SBC Lynx)

Info Box Applies to SBC Lynx

SBC Lynx is extremely flexible in terms of hardware configurations. This document details connector's pinout of common SBC Lynx models. For more information about models not documented here, please contact Sales department.

Introduction

This document details connectors, buttons and switches that equip SBC Lynx board. Please note that not all of them are available on all models.

The following table lists connectors, buttons and switches available on SBC Lynx.

Reference	Function	Type	Part number	Notes
J35	Power supply	2-pin header, male pins, Shrouded 0.200in pitch	Phoenix 1757242 MSTBA 2.5/2-G-5.08	[1]
JP1	Power supply	2.1mm ID, 5.5mm OD	CUI PJ-002A	[1]
J42	System console	TTL 3.3V UART 4-pin Header, Male 0.100in pitch
J50	System ONOFF / Power reset	4-pin Header, Male 0.100in pitch
J16	10/100 Base-T Ethernet port	RJ-45	Wurth 74990112116A
J43	microSD slot	push-pull slot	Molex 47571-0001
J47	USB OTG	USB type micro AB	Hirose ZX62D-AB-5P8
J55	USB OTG	USB type micro B vertical	Molex 105133-0011
J48	USB host	USB type A Right Angle	Wurth WE-614 004 134 726
J34	MPUART0 ( RS232 / RS485 / RS422 )	DB9 90° Connector Male or Female		[2], [3]
J38	MPUART0 ( RS232 / RS485 / RS422 )	3-pins Header, Male Pins, Shrouded 0.200in pitch	Phoenix 1755749 MSTBVA2.5/3-G5.08	[3]
J21	MPUART1 ( RS232 / RS485 / RS422 / CAN)	DB9 90° Connector Male or Female		[2], [4]
J39	MPUART1 ( RS232 / RS485 / RS422 / CAN)	3-pins Header, Male Pins, Shrouded 0.200in pitch	Phoenix 1755749 MSTBVA2.5/3-G5.08	[2]
J40	CAN	3-pins Header, Male Pins, Shrouded 0.200in pitch	Phoenix 1755749 MSTBVA2.5/3-G5.08	[4]
J46	DAVE DWM WiFi/Bluetooth module interface	30-pins SlimStack™ Receptacle 0.50mm pitch	Molex 52991-0308
J45/J52	ONE Piece	30x2 pins, pitch 1.00mm One Piece Interface	Samtec FSI-130-03-G-D-M-K-TR
J53/J54	Mezzanine Board Connectors	10-pins Header 0.100inch
S11	Reset button
S12	Boot Mode / UART Termination resistors	8-positions DIP Switches	WE-416131160808
J49	JTAG	1.27mm-pitch 5x2 header

[1] These parts are mutually exclusive.

[2] Because mechanical interferences, the following combinations are allowed:

Reference	Option #1	Option #2	Option #3	Option #4	Option #5
J39	populated	not populated	not populated	not populated	not populated
J21	not populated	populated	populated	not populated	not populated
J34	not populated	populated	not populated	populated	not populated

[3] These parts are mutually exclusive.

[4] These parts are mutually exclusive.

The following image shows where connectors, buttons and switches are located.

Connectors and switches layout

Connectors

Power supply connector (J35 / JP1)

J35

J35

Pin #	Name	Description	Notes
1	GND	Ground
2	VIN	Positive supply voltage	Range: 5 ÷ 24 V

JP1

JP1

Pin #	Name	Description	Notes
1	VIN	Positive supply voltage	Range: 5 ÷ 24 V
2	GND	Ground
3	GND	Ground

Serial console (J42)

J42

System console is by default routed to this interface. This is typically used during the development stage.

Pin #	Processor ball	Name	Default function	Type	Voltage domain	Notes
1	K14	UART1_TX_DATA	UART1 transmit line	Output	IO_3.3V	-
2	K16	UART1_RX_DATA	UART1 receive line	Input	IO_3.3V	-
3	-	IO_3.3V	UART1 I/O voltage reference	Voltage reference	IO_3.3V	-
4	-	DGND	Ground	-	-	-

Ethernet connector (J16)

J16

J16 is a standard RJ45 10/100BaseT Ethernet connector - incorporating magnetics - connected to the Ethernet controller and PHY.

J16 integrates a status LED providing connection information:

• LED on: link established
• LED blinking: activity.

The following table describes the interface signals:

Pin #	Name	Function	Notes
1	TDP	TX+
2	TCT	TX center tap
3	TDN	TX-
4	RDP	RX+
5	RCT	RX center tap
6	RDN	RX-
7	NC	Not connected
8	CHS_GND	Chassis ground	See also this page

microSD slot (J43)

J43

J43 is a push-pull microSD card slot connected to uSDHC1 port of MX6UL processor.

The following table details the pinout:

Pin #	Name	Function	Notes
1	DAT2	Data line #2
2	DAT3	Data line #3
3	CMD	Command
4	VDD	3.3V
5	CLK	Clock
6	Vss	Ground
7	DAT0	Data line #0
8	DAT1	Data line #2	See also this page
9	SD_SHIELD	Metal case	See also this page
10	SD_SHIELD	Metal case	See also this page
11	SD_SHIELD	Metal case	See also this page
12	Vss	Ground
13	CD	Card detect	Pulled-up to 3.3V

USB host port (J48)

J48

J48 is a standard USB Type A right angle connector connected to the MX6UL USB_OTG2 port signals.

The following table reports the connector's pinout:

Pin #	iMX6UL ball#	Pin name	Function	Notes
1	U12	USB_HOST_VBUS	5V	up to 470mA
2	T13	USB_OTG2_DN	USB2 Data -	-
3	U13	USB_OTG2_DP	USB2 Data +	-
4	-	DGND	Ground	-
5, 6, 7, 8	-	PCB_GND_RNG	Connector Shield	-

USB OTG port (J47)

J47

J47 is a standard USB Type micro AB connector connected to the MX6UL USB_OTG1 port signals.

The following table reports the connector's pinout:

Pin #	iMX6UL ball#	Pin name	Function	Notes
1	T12	USB_OTG_VBUS	Reference voltage from ext or 5V in HOST mode	Up to 75mA (HOST)
2	T15	USB_OTG1_DN	USB1 OTG Data -	-
3	U15	USB_OTG1_DP	USB1 OTG Data +	-
4	K13	USB_OTG1_ID	OTG ID	-
5	-	USB_GND	Ground	-
6, 7, 8, 9	-	PCB_GND_RNG	Connector Shield	-

Mezzanine board connectors (J53/J54)

J53-J54

Example of mezzanine usability

J53 and J54 are 10x1-pin 2.54mm-pitch vertical headers for optional mezzanine expansion boards. These boards can be implemented to extend SBC Lynx functionalities and/or interfaces.

It is worth remembering that some of the mezzanine board connectors signals are reserved for internal use or shared with One Piece connector (J45 / J52). Please contact Sales department for more information.

The following tables report the connectors' pinout.

J53

Pin #	Processor ball	Name	Default function	Type	Voltage domain	Notes
1	J16	UART2_RX_DATA	UART2_RX	I/O	IO_3.3V	[1], [2]
2	H14	UART2_nRTS	UART2_RTS	I/O	IO_3.3V	[1], [2]
3	J17	UART2_TX_DATA	UART2_TX	I/O	IO_3.3V	[1], [2]
4	J15	UART2_nCTS	UART2_CTS	I/O	IO_3.3V	[1], [2]
5	F17	UART5_TX_DATA	UART5_TX / I2C2_SCL	I/O	IO_3.3V
6	G13	UART5_RX_DATA	UART5_RX / I2C2_SDA	I/O	IO_3.3V
7	D14	MEZZANINE_GP0	GPIO / PWM	I/O	IO_3.3V	[3], [4]
8	A14	MEZZANINE_GP1	GPIO	I/O	IO_3.3V	[3], [4]
9	B16	MEZZANINE_GP2	GPIO	I/O	IO_3.3V	[3], [4]
10		DGND	Ground	-	-

[1] This group of signals can be configured to implement this alternative functions:

• I2C4
• CAN2
• SPI3 (CS0).

[2] Not available is DWM WIFI present

[3] This signal acts as bootstrap configuration flag and may be pulled up or down with 10kOhm resistor. Do not drive these signals until CPU_PORn is deasserted. For more details please refer to this section.

[4] Not available if 24-bit LCD interface is used.

J54

Pin #	Processor ball	Name	Default function	Type	Voltage domain	Notes
1	-	VIN	-	Power	-	Power supply of VIN_5_24V domain
2	-	PMIC_5V	-	Power	-	Power supply of AUX_5V domain
3	-	3V3_AUX	-	Power	-	Power supply of AUX_3.3V domain
4	-	VDDA_ADC_3P3	-	Power	-	Power supply of ADC_3.3V domain [5]
5	L15	GPIO1_IO01	GPIO / ADC	I/O	ADC_3.3V	12-bit ADC
6	L14	GPIO1_IO02	GPIO / ADC	I/O	ADC_3.3V	12-bit ADC
7	L17	GPIO1_IO03	GPIO / ADC	I/O	ADC_3.3V	12-bit ADC
8	M16	GPIO1_IO04	GPIO / ADC	I/O	ADC_3.3V	12-bit ADC
9	M17	GPIO1_IO05	GPIO / ADC	I/O	ADC_3.3V	12-bit ADC
10	-	DGND	Ground	-	-

[5] To be used for voltage reference only.

Handling bootstrap signals

MEZZANINE_GP0, MEZZANINE_GP1 and MEZZANINE_GP2 are connected to LCD_DATA19, LCD_DATA22 and LCD_DATA23 respectively. As such, they act as bootstrap configuration signals as well. They can be used by application software freely and the can be connected to user's application circuitry. However, any electrical interference during the processor reset cycle must be avoided.

There are different solutions to comply with this requirement. The following image shows a concept solution for this problem.

Concept solution to use bootstrap signals

During the processor reset cycle, MEZZANINE_GP0, MEZZANINE_GP1 and MEZZANINE_GP2 [1] are isolated from user's application logic by a bus switch that is in high-impedence state. Bus switch's BUS_SW_OE_n signal is connected to another processor's GPIO (GPIO1_IO01 in the example). Before configuring and using MEZZANINE_GPx signals, application software needs to:

• initialize GPIO1_IO01 as GPIO ouput
• set GPIO1_IO01 to logic level 0 in order to enable the switch.

[1] The same considerations apply to all of LCD_DATAx signals that are routed to J45/J52 connectors.

One-piece interfaces (J45 / J52)

J45

example of possible connections on J45

J52

example of possible connections on J52

J45 and J52 are two interfaces designed to be populated with Samtec 1.00mm-pitch 30x2-pin FSI One-piece connectors. The peculiarity of this kind of connectors if the fact that they

• allow to mate two boards by using one connector only
• the connector is mounted on one of the two boards indifferently.

J45 and J52 that share the same pinout, however they are intended to be used for different goals. J45 - that is placed on the top side of the PCB - is generally used to mate an optional expansion board. J52 - that is placed on the bottom side of the PCB - is conceived to mate SBC Lynx to a larger carrier board. In this case SBC Lynx can be thought as as an add-on for another board and can be powered via J52 interface itself.

It is worth remembering that some of the J45/J52 signals are reserved for internal use or shared with mezzanine board connectors. Please contact DAVE Embedded Systems' Sales department to get more information.

The following tables reports the interfaces' pinout that is the same for J45 and J52:

Pin #	Processor ball	Name and default function	Alternative functions [1]	Type (Assuming default function is selected)	Voltage domain	Notes
1	-	DGND	Ground			-
3	A8	LCD_CLK	UART4_TX	Output	IO_3.3V	-
5	B8	LCD_ENABLE	UART4_RX	Output	IO_3.3V	-
7	D9	LCD_HSYNC	UART4_CTS_B	Output	IO_3.3V	-
9	C9	LCD_VSYNC	UART4_RTS_B	Output	IO_3.3V	-
11	E9	LCD_RESET		Output	IO_3.3V	-
13	-	DGND	Ground			-
15	B9	LCD_DATA00		Output	IO_3.3V	-
17	A9	LCD_DATA01		Output	IO_3.3V	-
19	E10	LCD_DATA02		Output	IO_3.3V	-
21	D10	LCD_DATA03		Output	IO_3.3V	-
23	C10	LCD_DATA04		Output	IO_3.3V	-
25	B10	LCD_DATA05		Output	IO_3.3V	-
27	A10	LCD_DATA06	UART7_CTS_B	Output	IO_3.3V	-
29	-	DGND	Ground			-
31	D11	LCD_DATA07	UART7_RTS_B	Output	IO_3.3V	-
33	B11	LCD_DATA08	FLEXCAN1_TX	Output	IO_3.3V	-
35	A11	LCD_DATA09	FLEXCAN1_RX	Output	IO_3.3V	-
37	E12	LCD_DATA10	FLEXCAN2_TX / SAI3_RX_SYNC	Output	IO_3.3V	-
39	D12	LCD_DATA11	FLEXCAN2_RX / SAI3_RX_BCLK	Output	IO_3.3V	-
41	C12	LCD_DATA12	SAI3_TX_SYNC	Output	IO_3.3V	-
43	-	DGND	Ground			-
45	T13	USB_OTG2_EXP_DN	USB_OTG2_DN			[2]
47	U13	USB_OTG2_EXP_DP	USB_OTG2_DP			[2]
49	U12	USB_OTG2_VBUS	USB_OTG2_VBUS			-
51	K15	UART1_CTS_B	GPIO1_IO18	Input	IO_3.3V	-
53	-	CPU_PORn	Reset	Input		-
55	-	3V3_AUX	3V3 PMIC regulator			< 1A – shared with J54.3
57	-	VIN	Power Supply			-
59	-	DGND	Ground		IO_3.3V	-
2	B12	LCD_DATA13	SAI3_TX_BCLK / USDHC2_RESET_B	Output	IO_3.3V	-
4	A12	LCD_DATA14	SAI3_RX_DATA / USDHC2_DATA4	Output	IO_3.3V	-
6	D13	LCD_DATA15	SAI3_TX_DATA / USDHC2_DATA5	Output	IO_3.3V	-
8	C13	LCD_DATA16	UART7_TX / USDHC2_DATA6	Output	IO_3.3V	-
10	B13	LCD_DATA17	UART7_RX / USDHC2_DATA7	Output	IO_3.3V	-
12	A13	LCD_DATA18	PWM5_OUT / USDHC2_CMD	Output	IO_3.3V	-
14	D14	LCD_DATA19	PWM6_OUT / USDHC2_CLK	Output	IO_3.3V	-
16	C14	LCD_DATA20	ECSPI1_SCLK / USDHC2_DATA0	Output	IO_3.3V	SPI1 is available only if NOR is not mounted
18	B14	LCD_DATA21	ECSPI1_SS0 / USDHC2_DATA1	Output	IO_3.3V	SPI1 is available only if NOR is not mounted
20	A14	LCD_DATA22	ECSPI1_MOSI / USDHC2_DATA2	Output	IO_3.3V	SPI1 is available only if NOR is not mounted
22	B16	LCD_DATA23	ECSPI1_MISO / USDHC2_DATA3	Output	IO_3.3V	SPI1 is available only if NOR is not mounted
24	-	DGND	Ground			-
26	C17	ENET2_RX_DATA0	UART6_TX / I2C3_SCL	Input	IO_3.3V	Default: internally used as USB OTG power
28	C16	ENET2_RX_DATA1	UART6_RX / I2C3_SDA	Input	IO_3.3V	Default: internally used as USB OTG over current
30	B17	ENET2_RX_EN	UART7_TX / I2C4_SCL	Input	IO_3.3V	-
32	A15	ENET2_TX_DATA0	UART7_RX / I2C4_SDA /	Output	IO_3.3V	-
34	A16	ENET2_TX_DATA1	UART8_TX / ECSPI4_SCLK	Output	IO_3.3V	Default: internally used as USB HOST pwr
36	B15	ENET2_TX_EN	UART8_RX / ECSPI4_MOSI	Output	IO_3.3V	Default: internally used as USB HOST over current
38	D17	ENET2_TX_CLK	UART8_CTS_B / ECSPI4_MISO / ANATOP_OTG2_ID	Output	IO_3.3V	Default: internally used as UART8_CTS on MPUART0
40	D16	ENET2_RX_ER	UART8_RTS_B / ECSPI4_SS0	Input	IO_3.3V	Default: internally used as UART8_RTS on MPUART0
42	-	DGND	Ground		IO_3.3V	-
44	L16	GPIO1_IO07	ENET2_MDC / ADC1_IN7	Input/Output	IO_3.3V	Default: Internally used as ENET1_MDC
46	K17	GPIO1_IO06	ENET2_MDIO / ADC1_IN6	Input/Output	IO_3.3V	Default: Internally used as ENET1_MDIO
48	M17	GPIO1_IO05	UART5_RX / ADC1_IN5	Input/Output	IO_3.3V	-
50	M16	GPIO1_IO04	UART5_TX / TSC(xpul) / ADC1_IN4	Input/Output	IO_3.3V	-
52	L17	GPIO1_IO03	TSC(xnur) / ADC1_IN3	Input/Output	IO_3.3V	-
54	L14	GPIO1_IO02	TSC(ypll) / ADC1_IN2	Input/Output	IO_3.3V	-
56	L15	GPIO1_IO01	TSC(ynlr) / ADC1_IN1	Input/Output	IO_3.3V	-
58	K13	GPIO1_IO00	TSC(wiper) / ADC1_IN0	Input/Output	IO_3.3V	Default: internally used as USB OTG ID
60	-	DGND	Ground			-

[1] Please contact the Sales Deparment for more details.

[2] This signal can be routed here instead of connector J48. Please refer to the Sale Deparment for more details.

DWM WiFi/Bluetooth module connector (J46)

J46

J46 is a 30-pins SlimStack™ Receptacle 0.50mm pitch that allows to connect to DAVE Embedded Systems' DWM Wifi/BT module. The following table reports the connector's pinout:

Pin #	Processor ball	Name	Default function	Type	Voltage domain	Notes
1,2	-	PMIC_5V	5V DWM Module Power Supply			Up to 500mA shared with USB Host / OTG Mezzanine Board Connector
3,4	-	3V3_IO	DWM Level Shifter Power Supply			-
5, 6, 9, 10, 19	-	DGND	Ground			-
12, 14, 16, 18, 20, 22	-	NC	-			-
7	F3	WIFI_CMD	USDHC2_CMD	Output	IO_3.3V	-
8	F2	WIFI_CLK	USDHC2_CLK	Output	IO_3.3V	-
11	E4	WIFI_DATA0	USDHC2_DATA0	Input/Output	IO_3.3V	-
13	E3	WIFI_DATA1	USDHC2_DATA1	Input/Output	IO_3.3V	-
15	E2	WIFI_DATA2	USDHC2_DATA2	Input/Output	IO_3.3V	-
17	E1	WIFI_DATA3	USDHC2_DATA3	Input/Output	IO_3.3V	-
21	J16	BT_UART_RX	UART2_RX_DATA	Input	IO_3.3V	-
23	H14	BT_UART_CTS	UART2_CTS_B	Input	IO_3.3V	-
24	R9	TIWI_BT_F5	GPIO3_IO23	Input	IO_3.3V	-
25	J17	BT_UART_TX	UART2_TX_DATA	Output	IO_3.3V	-
26	R10	TIWI_BT_F2	GPIO3_IO24	Output	IO_3.3V	-
27	J15	BT_UART_RTS	UART2_RTS_B	Output	IO_3.3V	-
28	P10	TIWI_IRQ	GPIO5_IO04	Input	IO_3.3V	-
29	N10	TIWI_BT_EN	SNVS_TAMPER7	Output	IO_3.3V	-
30	P9	TIWI_EN	GPIO5_IO03	Output	IO_3.3V	-

Multiprotocol UARTs and CAN interfaces

There are two UART multiprotocol ports (RS232 / RS485 / RS422) and one CAN interface available on SBC LYNX. They are described in the same section because they share some resources. Please refer to this section for more details about allowable combinations.

Multiprotocol UARTs

Multiprotocol UARTs are named as MPUART0 and MPUART1. They are associated to i.MX6UL's native UART8 and UART3 respectively. They are routed to connectors through Intersil ISL3330 transceivers (one for each port).

Generally speaking, multiprotocol UARTs

• supports RS232, RS485 and RS422 electrical protocols independently (meaning that, for example, MPUART0 can be configured as RS485 and MPUART1 can be configured as RS485)
  • electrical protocol is selected by different mounting options
• can be routed to different types of connector independently; supported connectors are:
  • right-angle male DB9
  • Phoenix 1755749 MSTBVA2.5/3-G5.08 (vertical)
  • Phoenix 1757255 MSTBA 2.5/3-G-5.08 (righ-angle).

This wide flexibility allows to implement many different combinations. The following table details two of them. For actual available options, please contact Sales department.

P/N and image	MPUART0					MPUART1
	Connector		i.MX6UL's native port	Pinout	Electrical protocol	Connector		i.MX6UL's native port	Pinout	Electrical protocol
	Reference	Type				Reference	Type
XUBx0xxxxx XUBx0xxxxx	J34	Right-angle male DB9	UART8	See this section.	RS232	J21	Right-angle male DB9	UART3	See this section.	RS485
XUBx1xxxxx XUBx1xxxxx	J38	Phoenix 1755749 MSTBVA2.5/3-G5.08	UART8	See this section.	RS485	not populated	n/a	n/a	n/a	n/a

Transceivers' connection

The following table describes the MPUART0 signals to the ISL3330 transceiver:

Pin #	Processor ball	Name	Default function	Type	Voltage domain	Notes
8	-	MPUART0_485/232#	Protocol Selection			Fixed with Pull UP/DOWN resistor
9	N9	MPUART0_DEN	Driver Output Enable	Output	IO_3.3V	-
12	R6	MPUART0_RXEN	Receiver Output Enable	Output	IO_3.3V	-
13	F5	MPUART0_ON	RS232 Charge Pump Enable	Output	IO_3.3V	-
14	D16	MPUART0_nRTS	UART8_RTS_B	Output	IO_3.3V	-
15	C14	MPUART0_TX_DATA	UART8_TX	Output	IO_3.3V	-
16	D17	MPUART0_nCTS	UART8_CTS_B	Input	IO_3.3V	-
17	B14	MPUART0_RX_DATA	UART8_RX	Input	IO_3.3V	-

The following table describes the MPUART1 signals to the ISL3330 transceiver:

Pin #	Processor ball	Name	Default function	Type	Voltage domain	Notes
8	-	MPUART1_485/232#	Protocol Selection			Fixed with Pull UP/DOWN resistor
9	N8	MPUART1_DEN	Driver Output Enable	Output	IO_3.3V	-
12	N11	MPUART1_RXEN	Receiver Output Enable	Output	IO_3.3V	-
13	E5	MPUART1_ON	RS232 Charge Pump Enable	Output	IO_3.3V	-
14	G14	MPUART1_nRTS	UART3_RTS_B	Output	IO_3.3V	-
15	H17	MPUART1_TX_DATA	UART3_TX_DATA	Output	IO_3.3V	-
16	H15	MPUART1_nCTS	UART3_CTS_B	Input	IO_3.3V	-
17	H16	MPUART1_RX_DATA	UART3_RX_DATA	Input	IO_3.3V	-

The following table describes the CAN to the SN65HVD23x transceiver:

Pin #	Processor ball	Name	Default function	Type	Voltage domain	Notes
1	H15	CAN_D	Transmit data input	Input	IO_3.3V	Alternative to MPUART1_nCTS
4	G14	CAN_R	Receive data output	Output	IO_3.3V	Alternative to MPUART1_nRTS

Connector's pinout

The following sections detail connectcors' pinout for the supported configuration. In case RS422 or RS485 configurations are used, termination options are selectable by acting on S12 switches, as described in this section.

RS232 on DB9 (J34, J21)

J34

J21

MPUART0 J34

Pin #	Internal connection	Signal name	Notes
1	not connected	n/a
2	MPUART0_A	RXD
3	MPUART0_Y	TXD
4	not connected	n/a
5	DGND	Ground
6	not connected	n/a
7	MPUART0_Z	RTS
8	MPUART0_B	CTSn
9	not connected	n/a
SH1, SH2	PCB_GND_RNG	Shield

MPUART1 J21

Pin #	Internal connection	Signal name	Notes
1	not connected	n/a
2	MPUART1_A	RXD
3	MPUART1_Y	TXD
4	not connected	n/a
5	DGND	Ground
6	not connected	n/a
7	MPUART1_Z	RTS
8	MPUART1_B	CTSn
9	not connected	n/a
SH1, SH2	PCB_GND_RNG	Shield

RS422 on DB9 (J34, J21)

MPUART0 J34

Pin #	Internal connection	Signal name	Notes
1	not connected	n/a
2	MPUART0_A	Inverting receiver input
3	MPUART0_Y	Inverting driver output
4	not connected	n/a
5	DGND	Ground
6	not connected	n/a
7	MPUART0_Z	Non-inverting driver output
8	MPUART0_B	Non-inverting receiver input
9	not connected	n/a
SH1, SH2	PCB_GND_RNG	Shield

MPUART1 J21

Pin #	Internal connection	Signal name	Notes
1	not connected	n/a
2	MPUART1_A	Inverting receiver input
3	MPUART1_Y	Inverting driver output
4	not connected	n/a
5	DGND	Ground
6	not connected	n/a
7	MPUART1_Z	Non-inverting driver output
8	MPUART1_B	Non-inverting receiver input
9	not connected	n/a
SH1, SH2	PCB_GND_RNG	Shield

RS485 on DB9 (J34, J21)

MPUART0 J34

Pin #	Internal connection	Signal name	Notes
1	not connected	n/a
2	MPUART0_A, MPUART0_Y	Inverting receiver input, inverting driver output
3	MPUART0_A, MPUART0_Y	Inverting receiver input, inverting driver output
4	not connected	n/a
5	DGND	Ground
6	not connected	n/a
7	MPUART0_B, MPUART0_Z	Non-inverting receiver input, non-inverting driver output
8	MPUART0_B, MPUART0_Z	Non-inverting receiver input, non-inverting driver output
9	not connected	n/a
SH1, SH2	PCB_GND_RNG	Shield

MPUART1 J21

Pin #	Internal connection	Signal name	Notes
1	not connected	n/a
2	MPUART1_A, MPUART1_Y	Inverting receiver input, inverting driver output
3	MPUART1_A, MPUART1_Y	Inverting receiver input, inverting driver output
4	not connected	n/a
5	DGND	Ground
6	not connected	n/a
7	MPUART1_B, MPUART1_Z	Non-inverting receiver input, non-inverting driver output
8	MPUART1_B, MPUART1_Z	Non-inverting receiver input, non-inverting driver output
9	not connected	n/a
SH1, SH2	PCB_GND_RNG	Shield

RS232 on Phoenix 1755749 MSTBVA2.5/3-G5.08 (vertical; J38, J39)

J38

J39

MPUART0 J38

Pin #	Internal connection	Signal name	Notes
1	MPUART0_A	RXD
2	MPUART0_Y	TXD
3	DGND	Ground

MPUART1 J39

Pin #	Internal connection	Signal name	Notes
1	MPUART1_A	RXD
2	MPUART1_Y	TXD
3	DGND	Ground

RS232 on Phoenix 1757255 MSTBVA2.5/3-G5.08 (right-angle; J38, J39)

MPUART0 J38

Pin #	Internal connection	Signal name	Notes
1	MPUART0_A	RXD
2	MPUART0_Y	TXD
3	DGND	Ground

MPUART1 J39

Pin #	Internal connection	Signal name	Notes
1	MPUART1_A	RXD
2	MPUART1_Y	TXD
3	DGND	Ground

RS485 on Phoenix 1755749 MSTBVA2.5/3-G5.08 (vertical; J38, J39)

MPUART0 J38

Pin #	Internal connection	Signal name	Notes
1	MPUART0_A	Inverting receiver input, inverting driver output
2	MPUART0_B	Non-inverting receiver input, non-inverting driver output
3	DGND	Ground

MPUART1 J39

Pin #	Internal connection	Signal name	Notes
1	MPUART1_A	Inverting receiver input, inverting driver output
2	MPUART1_B	Non-inverting receiver input, non-inverting driver output
3	DGND	Ground

RS485 on Phoenix 1757255 MSTBVA2.5/3-G5.08 (right-angle; J38, J39)

MPUART0 J38

Pin #	Internal connection	Signal name	Notes
1	MPUART0_A	Inverting receiver input, inverting driver output
2	MPUART0_B	Non-inverting receiver input, non-inverting driver output
3	DGND	Ground

MPUART1 J39

Pin #	Internal connection	Signal name	Notes
1	MPUART1_A	Inverting receiver input, inverting driver output
2	MPUART1_B	Non-inverting receiver input, non-inverting driver output
3	DGND	Ground

Additional options for RS422 and RS485 interfaces

Other options are available on request, as described in the following sections. For more information, please contact Sales department.

Fail-safe resistors

On request, it is possible to populate fail-safe resistors on RS422/RS485 differential signals. For more information, please contact Sales department.

RS485 alternative pinout for DB9 connector

J21

On request, it is possible to implement the following pinout.

MPUART0

Pin #	Internal connection	Signal name	Notes
1	not connected	n/a
2	MPUARTx_B, MPUARTx_Z	Non-inverting receiver input, non-inverting driver output
3	not connected	n/a
4	not connected	n/a
5	DGND	Ground
6	not connected	n/a
7	not connected	n/a
8	MPUARTx_A, MPUARTx_Y	Inverting receiver input, inverting driver output
9	not connected	n/a
SH1, SH2	PCB_GND_RNG	Shield

CAN (J40 or J21)

J40

J21

CAN interface is associated to the i.MX6UL's FLEXCAN1 controller. Transceiver is Texas Instruments SN65HVD23x.

There are two mutually exclusive moounting options available for CAN bus:

• J40 (3-pin shrouded header)
• J21 (DB9).

If J21 is selected, MPUART1 is not available and the connector's pinout is the one detailed in the following table.

CAN interface on J21

Pin #	Internal connection	Signal name	Notes
1	not connected	n/a
2	Dominant low	CAN_M
3	Ground	CAN_GND
4	not connected	n/a
5	Shield	CAN_SHIELD
6	not connected	n/a
7	Dominant high	CAN_P
8	not connected	n/a
9	not connected	n/a
SH1, SH2	PCB_GND_RNG	Shield

J40 is a 0.200-inch pitch 3-pin shrouded header (Phoenix 1755749 MSTBVA2.5/3-G5.08). Please refer to the following table for the detailed pinout.

CAN interface on J40

Pin #	Internal connection	Signal name	Notes
1	Dominant high	CAN_P
2	Dominant low	CAN_M
3	Ground	DGND
4	PCB_GND_RNG	Guard ring

CPU ONOFF / Power reset connector (J50)

J50

J50 is a 0.100in-pitch 4-pin male header that allows connection to signals needed to implement advanced power modes.

The following table reports the connector pinout:

Pin #	Processor ball	Name	Default function	Default type	Voltage domain	Notes
1	R8	CPU_ONOFF	See this page.	-	SNVS
2	-	SXUB_ENA	Main DC/DC enable	Input	VIN_5_24V	See this page.
3	-	PMIC_PWRON	See this page.	-	SNVS
4	-	DGND	Ground	0V	-

For more details please refer to this page.

Buttons

Reset button (S11)

S11

When pressed, a full power-up cycle is triggered, resulting in a complete hardware reset of the system.

Switches

Boot mode (S12)

S12

Please refer to this page.

Multiprotocol UARTs settings (S12)

RS422 configuration

MPUART0

Switch #	Position	Setting
3	on	Connect 120 Ohm termination for transmitter pair
	off	Disconnect any termination for transmitter pair
4	on	Connect 120 Ohm termination for receiver pair
	off	Disconnect any termination for receiver pair

MPUART1

Switch #	Position	Setting
5	on	Connect 120 Ohm termination for transmitter pair
	off	Disconnect any termination for transmitter pair
6	on	Connect 120 Ohm termination for receiver pair
	off	Disconnect any termination for receiver pair

RS485 configuration

MPUART0

Switch #	Position	Setting
3	on	120R Termination for Bidirectional Differential Pair
	off	No Termination for Bidirectional Differential Pair
4	on	N.C.
	off	N.C.

MPUART1

Switch #	Position	Setting
5	on	120R Termination for Bidirectional Differential Pair
	off	No Termination for Bidirectional Differential Pair
6	on	N.C.
	off	N.C.

CAN bus settings (S12)

S12.7 switch allows to connect/disconnect 120 Ohm termination between dominant high and low signals.

CAN termination

S12.7 position	Termination
on	connected
off	disconnected