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ECM-3612
32 ECM-3612 User’s Manual
2.3.7.2 Serial Port 2 Connector in RS-422 Mode
Signal PIN PIN Signal
Tx- 1 2 Rx+
Tx+ 3 4 Rx-
NC 5 6 NC
NC 7 8 NC
NC 9 10 NC
2.3.7.2.1 Signal Description – Serial Port 2 Connector in RS-422 Mode (CM4)
Signal Signal Description
Tx +/-
Serial output. This differential signal pair sends serial data to the communication
link. Data is transferred from Serial Port 2 Transmit Buffer Register to the
communication link, if the RTS register of the Serial Port 2 is set to LOW.
Rx +/-
Serial input. This differential signal pair receives serial data from the
communication link. Received data is available in Serial Port 2 Receiver Buffer
Register.