2. Connector Pin Assignments

The pin assignments for the wrapfield are identical with the pins of Stamp9G20. The pin assignment for X21/X22 are below:

1 VCCDSR0 ISI D2PB22 2
3PB25 ISI D5 RI0RXD0 PB5 4
5 PB4 TXD0DTR0 ISI D4PB24 6
7PB26 ISI D6 RTS0CTS0 ISI D7PB27 8
9PB23 ISI D3 DCD0 GND10
11PB14 DRXD DTXD PB1512
13 PA7 MCCDA MCCK PA814
15 PA6 MCDA0 MCDA1 PA916
17PA10 ETX2 MCDA2 MCDA3 ETX3PA1118
19 VCC GND20
21 USB Host A- USB Host B-22
23 USB Host A+ USB Host B+24
25 USB Device- USB Device+26
27PA22 ETXER ADTRG /RESET28
29 VCC GND30
31PB17 TCLK4 TF0 RF0 ISI D1PB2132
33PB16 TCLK3 TK0 RK0 ISI D0PB2034
35PB18 TIOB4 TD0 RD0TIOB5PB1936
37 BMS WKUP38
39 SHDN VBATT40

Table 1.1. Pin Assignment and Multiplexing X21


1 VCC SCK2 RXD4PA30 2
3 PA31 TXD4 SCK0 RXD2 PB9 4
5 PB8 TXD2 TXD1 TCLK1 PB6 6
7 PA4 MCDB2 RTS2 CTS2 MCDB1 PA5 8
9 PB7 TCLK2 RXD1 GND10
11PA23 ETX2 TWD TWCK ETX3PA2412
13 VCC GND14
15 PB0 TIOA3SPI1MISOSPI1MOSI TIOB3 PB116
17 PB2 TIOA4 SPI1CLK SPI1CS1 TIOA5 PB318
19 PA0 MCDB0 SPI1CS2 SPI1CS3 PC320
21 22
23 24
25 26
27 VCC GND28
29 TDI TMS30
31 TDO TCK32
33 ELED_L ELED_S34
35 ETX+ ETX-36
37 ERX+ ERX-38
39 POE1 POE240

Table 1.2. Pin Assignment and Multiplexing X22