FOX Board G20 pinout

All General purpose I/O are 3.3V compatible unless otherwise stated. They are NOT 5V tolerant.

ID colums indicated the Kernel GPIO line identifier (see Using GPIO lines)

J7 extension port

All General purpose I/O are 3.3V compatible unless otherwise stated. They are NOT 5V tolerant.

Pin #	ID	I/O line	Alt	Description
J7.1		GND		Signal ground
J7.2		GND		Signal ground
J7.3	82	PB18		General purpose I/O
J7.4	83	PB19		General purpose I/O
J7.5	80	PB16		General purpose I/O. Used in the tutorials as 1-wire bus line
J7.6	81	PB17		General purpose I/O
J7.7	66	PB2		General purpose I/O
J7.8	67	PB3		General purpose I/O
J7.9	64	PB0		General purpose I/O
J7.10	65	PB1		General purpose I/O
J7.11	110	PC14		General purpose I/O 1.8V
J7.12	111	PC15		General purpose I/O 1.8V
J7.13	108	PC12		General purpose I/O 1.8V
J7.14	109	PC13		General purpose I/O 1.8V
J7.15	105	PC9		General purpose I/O 1.8V
J7.16	106	PC10	CTS3	Clear to send ttyS4 1.8V
J7.17	103	PC7		Red led line 1.8V
J7.18	104	PC8	RTS3	Request to send ttyS4 1.8V
J7.19	101	PC5		General purpose I/O 1.8V
J7.20	102	PC6		Reserved line. This line is used to read if the client USB port is wired to a PC
J7.21	73	PB9	RXD2	Receive data ttyS3
J7.22	72	PB8	TXD2	Transmit data ttyS3
J7.23		BATT		RTC Battery input
J7.24		PGD		Power good NetusPS1
J7.25		POK		3.3V NetusPS1 aux output stable
J7.26		SHDNPS#		PS1 shutdown. Active low
J7.27		NRST		Reset output
J7.28		SHDN#		Turn off the CPU when low
J7.29		5V		5 volt power line
J7.30		WAKEUP		Wake up input
J7.31	87	PB23	DCD0	Data carrier detect ttyS1
J7.32	86	PB22	DSR0	Data set ready ttyS1
J7.33	89	PB25	RI0	Ring indicator ttyS1
J7.34	88	PB24	DTR0	Data terminal ready ttyS1
J7.35	60	PA28		General purpose I/O
J7.36	59	PA27		General purpose I/O
J7.37	58	PA26		General purpose I/O
J7.38	57	PA25		General purpose I/O
J7.39		3.3V		3.3 volt power line
J7.40		3.3V		3.3 volt power line

All General purpose I/O are 3.3V compatible unless otherwise stated. They are NOT 5V tolerant.

Pin #	ID	Line	Alt	Description
J6.1		3.3V		3.3 volt DC power line
J6.2		3,3V		3.3 volt DC power line
J6.3	92	PB28	RTS1	Request to send ttyS2
J6.4	71	PB7	RXD1	Receive data ttyS2
J6.5	70	PB6	TXD1	Transmit line ttyS2
J6.6	93	PB29	CTS1	Clear to send ttyS2
J6.7	90	PB26	RTS0	Request to send ttyS1
J6.8	69	PB5	RXD0	Receive data ttyS1
J6.9	68	PB4	TXD0	Transmit data ttyS1
J6.10	91	PB27	CTS0	Clear to send ttyS1
J6.11				N.C. (See the schematic)
J6.12		5V		5 volt DC power live
J6.13	75	PB11	RXD3	Receive data ttyS4
J6.14	74	PB10	TXD3	Transmit data ttyS4
J6.15	77	PB13	RXD5	Receive data ttyS6
J6.16	76	PB12	TXD5	Transmit data ttyS6
J6.17	85	PB21		General purpose I/O
J6.18	84	PB20		General purpose I/O
J6.19	95	PB31		General purpose I/O
J6.20	94	PB30		General purpose I/O
J6.21	63	PA31	TXD4	Transmit data ttyS5
J6.22	62	PA30	RXD4	Receive data ttyS5
J6.23				N.C. (See the schematic)
J6.24	38	PA6		General purpose I/O
J6.25	39	PA7		General purpose I/O
J6.26	41	PA9		General purpose I/O
J6.27	99	PC3	AD3	Analog input 3
J6.28	98	PC2	AD2	Analog input 2
J6.29	97	PC1	AD1	Analog input 1
J6.30	96	PC0	AD0	Analog input 0
J6.31	56	PA24	SCL	I2C Clock
J6.32	55	PA23	SDA	I2C Data
J6.33		AVDD		Clean 3.3V out for A/D circuitry
J6.34		VREF		A/D voltage reference input
J6.35		AGND		Analog ground
J6.36	42	PA10		General purpose I/O
J6.37	54	PA22		General purpose I/O
J6.38	43	PA11		General purpose I/O
J6.39		GND		Signal ground
J6.40		GND		Signal ground

Pin #	ID	Line	Alt	Description
J10.1		3V3		3.3 volt DC power line
J10.2	56	PA24	TWCK	I2C Clock
J10.3	79	PB15	DTXD	Transmit line ttyS0 Debug port
J10.4	78	PB14	DRXD	Receive line ttyS0 Debug port
J10.5	55	PA23	TWD	I2C Data
J10.6		GND		Signal ground

Pin #	ID	Line	Alt
J16.1		5V		5 volt power line
J16.2	73	PB9	RXD2	Receive line ttyS3 (wire to 4D oLED TXD line)
J16.3	72	PB8	TXD2	Transmit line ttyS3 (wire to 4D oLED RXD line)
J16.4		GND		Signal ground
J16.5				Not connected