Wiren Board 6: Peripherals

The article describes the connection of the built-in peripherals to the processor signals for the Wiren Board 6 (rev. 6.2, 6.3, 6.4, 6.5).

Wiren Board 6.1:List of GPIOs

RS-485 ports implementation

Controller model	Port name in Linux	Alternative port name in Linux	Controller connector	Note
Wiren Board 6	/dev/ttymxc1	/dev/ttyRS485-1	Signed RS-485, terminals A and B	non-isolated port, a terminator is installed
	/dev/ttymxc3	/dev/ttyRS485-2	Signed RS-485, terminals A/L and B/H (also can be used as CAN port)	non-isolated port, a terminator is installed, multiplexed with CAN

GPIO on the terminals

terminal	function	GPIO		i.mx6UL output	comments
W1 (in)	1-wire/DI	GPIO1_IO11	11	P14	1-wire as default
W2 (in)	1-wire/DI	GPIO4_IO12	108	A3

GPIO for transistors (A1-A4)

terminal	function	GPIO	GPIO number	i.mx6UL output	comments
A1 (out)	ADC/FET/DI	GPIO3_IO15	79		open collector output;
A2 (out)	ADC/FET/DI	GPIO3_IO16	80		open collector output;
A3 (out)	ADC/FET/DI	GPIO3_IO17	81		open collector output;
A4 (out)	ADC/FET/DI	GPIO3_IO18	82		open collector output;

GPIO for inputs (A1-A4)

terminal	function	GPIO	GPIO number	i.mx6UL pin	comments
A1 (in)	ADC/FET/DI	GPIO4_IO13	109	MX6UL_PAD_NAND_CE0_B
A2 (in)	ADC/FET/DI	GPIO4_IO15	111	MX6UL_PAD_NAND_CLE
A3 (in)	ADC/FET/DI	GPIO4_IO14	110	MX6UL_PAD_NAND_CE1_B
A4 (in)	ADC/FET/DI	GPIO1_IO00	0	MX6UL_PAD_GPIO1_IO00

In rev. 6.5, the polarity of the inputs was changed - the presence of voltage on A1-A4 corresponds to 0 on GPIO.

ADC channels

terminal	ADC channel	Divider	Formula (no divider)	V max measured	comments
A1	4	88k7, 12k
A2	2
A3	1
A4	3
Vin (in WB6.2-6.4)	8	88k7, 12k
Vin (in WB6.5)	8	200k, 12k
5Vout	5	33k, 12k

Pins for internal use

sodim pin	GPIO	GPIO number	i.mx6UL pin	function
84	GPIO1_IO13	13		transistor 1-wire pull up
77	GPIO4_IO16	112		transistor 1-wire pull up (W2)
36	GPIO1_IO27	27		5V out
176	GPIO3_IO14	78	LCD_DATA09	RFM69H IRQ
178	GPIO3_IO13		LCD_DATA08	RFM69H _DIO2
180	GPIO3_IO28		LCD_DATA23	RFM69 MISO
182	GPIO3_IO27		LCD_DATA22	RFM69 MOSI
186	GPIO3_IO25		LCD_DATA20	RFM69 SCK
184	GPIO3_IO26		LCD_DATA21	RFM69H chip select
?	?	?		SIM900R power FET (RESET)
164	GPIO3_IO20	84		SIM900R power KEY
166	GPIO3_IO19	83		SIM900R power status (input)
188	GPIO3_IO24	88		SIM slot select (low: 1, high: 2)
23	GPIO2_IO19	51	SD1_DATA1	watchdog input
162	PWM1_OUT			Buzzer
80				Red LED
82				Green LED
69				2nd ethernet LED
65	GPIO1_IO18	18		STAT1 (BATTERY_CHARGING)
67	GPIO1_IO19	19		STAT2 (BATTERY_PRESENT)
152	GPIO3_IO10			Wi-Fi power (active low)
29	GPIO2_IO16			i2c for RTC, SDA
31	GPIO2_IO17			i2c for RTC, SCL
144	GPIO3_IO12		PAD_LCD_DATA07	i2c for EEPROM1, SDA
142	GPIO3_IO03		PAD_LCD_VSYNC	i2c for EEPROM1, SCL
160	GPIO3_IO06		PAD_LCD_DATA01	i2c for EEPROM2, SDA
158	GPIO3_IO07		PAD_LCD_DATA02	i2c for EEPROM2, SCL
75	GPIO4_IO11	107		USB power
154	GPIO3_IO09	73		V_OUT_ON
156	GPIO3_IO08	72		V_OUT_ST
102	GPIO4_IO23	119	PAD_CSI_DATA02	RS-485-1 failsafe bias
190	GPIO3_IO23	87	PAD_LCD_DATA18	RS-485-2 failsafe bias
40	GPIO1_IO23	23	PAD_UART2_RTS_B	CAN transciever power
	GPIO5_10	138		FW button

GPIO on MOD1 extension connector

sodim pin	GPIO	GPIO number	imx287 pin	pinmux pad name	pin	function
-	-		-		3.3V	-
30	GPIO1_IO24		H17	UART3_TX_DATA	TX	uart tx
32	GPIO1_IO25		H16	UART3_RX_DATA	RX	uart rx
-					5V	-
34	GPIO1_IO26		H15	UART3_CTS_B	DE	uart de
-					GND	-

GPIO on MOD2 extension connector

sodim pin	GPIO	GPIO number	imx6ul pin	pinmux pad name	pin	function
-	-		-		3.3V	-
98	GPIO4_IO21		E4	CSI_DATA00	TX	uart tx	MX6UL_PAD_CSI_DATA00__UART5_DCE_TX
49				JTAG_MOD	TX (muxed через 3k, 12k PD)	spdif out
100	GPIO4_IO22		E3	CSI_DATA01	RX		MX6UL_PAD_CSI_DATA01__UART5_DCE_RX
-					5V	-
52	GPIO1_IO09		M15	GPIO1_IO09	DE	uart de, pwm, spdif in
-					GND	-

GPIO on MOD3 extension connector

sodim pin	GPIO	GPIO number	imx6ul pin	pinmux pad name	pin	function
-					3.3V	-
194	GPIO3_IO21	85		LCD_DATA16	TX	uart tx
192	GPIO3_IO22	86		LCD_DATA17	RX	uart rx
112	GPIO4_IO28	124	D1	CSI_DATA07	MISO	spi miso	MX6UL_PAD_CSI_DATA07__ECSPI1_MISO
106	GPIO4_IO25	121	D4D	CSI_DATA04	SCK	spi sck	MX6UL_PAD_CSI_DATA04__ECSPI1_SCLK
-					5V	-
150	GPIO3_IO11	75	A10	LCD_DATA06	DE	uart de
-					GND	-
110	GPIO4_IO27	123	D2	CSI_DATA06	MOSI	spi mosi	MX6UL_PAD_CSI_DATA06__ECSPI1_MOSI
108	GPIO4_IO26	122	D3	CSI_DATA05	SS	spi ss	MX6UL_PAD_CSI_DATA05__ECSPI1_SS0