B. Appendix: Connector Pinout Reference
Pin
Pin Name
1
GND
2
+5V
3
COM2_RX
4
COM2_TX
Function
Ground
Supply Voltage
Active-Low TTL input with internal pull-up resistor of asynchronous RXD
to COM2.
Active-Low TTL output (push/pull) of asynchronous TXD from COM2.
Table B.4.: COM 2 Port (X220) Pin Configuration
Page 11 of 11
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