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FOX Board G20 technical documentation
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FOXG20 pinout
J6 pinstrip pads
Pin #
IC Pin
Default
Alt
ID 2.6x
ID 3.1x
Note
J6.1
3.3V
Power line 3.3 Volt
J6.2
3.3V
Power line 3.3 Volt
J6.3
PB28
RTS1
GPIO
92
60
/dev/ttyS2 RTS
J6.4
PB7
RXD1
GPIO
71
39
/dev/ttyS2 RXD
J6.5
PB6
TXD1
GPIO
70
38
/dev/ttyS2 TXD
J6.6
PB29
CTS1
GPIO
93
61
/dev/ttyS2 CTS
J6.7
PB26
RTS0
GPIO
90
58
/dev/ttyS1 RTS
J6.8
PB5
RXD0
GPIO
69
37
/dev/ttyS1 RXD
J6.9
PB4
TXD0
GPIO
68
36
/dev/ttyS1 TXD
J6.10
PB27
CTS0
GPIO
91
59
/dev/ttyS1 CTS
J6.11
J6.12
5V
Power line 5 Volt
J6.13
PB11
RXD3
GPIO
75
43
/dev/ttyS4 RXD
J6.14
PB10
TXD3
GPIO
74
42
/dev/ttyS4 TXD
J6.15
PB13
GPIO
77
45
J6.16
PB12
GPIO
76
44
J6.17
PB21
GPIO
85
53
J6.18
PB20
GPIO
84
52
J6.19
PB31
GPIO
95
63
J6.20
PB30
GPIO
94
62
J6.21
PA31
GPIO
63
31
J6.22
PA30
GPIO
62
30
J6.23
J6.24
PA6
GPIO
38
6
J6.25
PA7
GPIO
39
7
J6.26
PA9
GPIO
41
9
J6.27
PC3
AD3
NPCS3
99
67
Analog input 3 or SPI bus chip select 3
J6.28
PC2
AD2
GPIO
98
66
Analog input 2
J6.29
PC1
AD1
GPIO
97
65
Analog input 1
J6.30
PC0
AD0
GPIO
96
64
Analog input 0
J6.31
PA24
SCL
GPIO
56
24
I2C Clock
J6.32
PA23
SCD
GPIO
55
23
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
PA10
GPIO
42
10
J6.37
PA22
GPIO
54
22
J6.38
PA11
GPIO
43
11
J6.39
GND
Power line GND
J6.40
GND
Power line GND
J7 pinstrip pads
Pin #
IC Pin
Default
Alt
ID 2.6x
ID 3.1x
Note
J7.1
GND
Power line GND
J7.2
GND
Power line GND
J7.3
PB18
GPIO
82
50
J7.4
PB19
GPIO
83
51
J7.5
PB16
GPIO
80
48
J7.6
PB17
GPIO
81
49
J7.7
PB2
CK
GPIO
66
34
SPI bus clock
J7.8
PB3
NPCS0
GPIO
67
35
SPI CS0
J7.9
PB0
MISO
GPIO
68
36
SPI MISO
J7.10
PB1
MOSI
GPIO
69
37
SPI MOSI
J7.11
PC14
GPIO
110
78
Signal level at 1.8V
J7.12
PC15
GPIO
111
79
Signal level at 1.8V
J7.13
PC12
GPIO
108
76
Signal level at 1.8V
J7.14
PC13
GPIO
109
77
Signal level at 1.8V
J7.15
PC9
GPIO
105
73
Signal level at 1.8V
J7.16
PC10
CTS3
GPIO
106
74
/dev/ttyS4 CTS at 1.8V.
J7.17
PC7
GPIO
103
71
Wired on PC7 red led. Signal level at 1.8V
J7.18
PC8
RTS3
GPIO
104
72
/dev/ttyS4 RTS. Signal level at 1.8V
J7.19
PC5
NPCS1
GPIO
101
69
SPI bus CS1
J7.20
PC6
GPIO
102
70
Reserved. Used to read if the client USB port is wired to a PC
J7.21
PB9
RXD2
GPIO
73
41
/dev/ttyS3 RXD
J7.22
PB8
TXD2
GPIO
72
40
/dev/ttyS3 TXD
J7.23
BATT
RTC Battery input, Use this terminal to wire an external 3.3 volt RTC backup battery
J7.24
PGD
Wired to power good line on Netus PS1
J7.25
POK
Wired to power ok line on Netus PS1
J7.26
SHDNPS#
PS1 shutdown. Active low
J7.27
NRST
Active low CPU reset input line
J7.28
SHDN#
Wired to the SHDN Netus G20 line
J7.29
5V
5 volt power line
J7.30
WAKEUP
Wired to the WAKEUP Netus G20 line
J7.31
PB23
GPIO
87
55
J7.32
PB22
GPIO
86
54
J7.33
PB25
GPIO
89
57
J7.34
PB24
GPIO
88
56
J7.35
PA28
GPIO
60
28
J7.36
PA27
GPIO
59
27
J7.37
PA26
GPIO
58
26
J7.38
PA25
GPIO
57
25
J7.39
3.3V
Power line 3.3 Volt
J7.40
3.3V
Power line 3.3 Volt
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