User Manual

The COM ports of the 7521 are given as follows:
COM port Hardware
COM1 80188’s on-chip UART-0, 5-wire RS-232 & 2-wire
RS-485
COM2 80188’s on-chip UART-1, 2-wire RS-485
The COM ports of the 7522 are given as follows:
COM port Hardware
COM1 80188’s on-chip UART-0, 5-wire RS-232 & 2-wire
RS-485
COM2 80188’s on-chip UART-1, 2-wire RS-485
COM3 16C550, I/O expansion bus, 5-wire RS-232
The COM ports of the 7523 are given as follows:
COM port Hardware
COM1 80188’s on-chip UART-0, 5-wire RS-232 & 2-wire
RS-485
COM2 80188’s on-chip UART-1, 2-wire RS-485
COM3 16C550, I/O expansion bus, 5-wire RS-232
COM4 16C550, I/O expansion bus, 3-wire RS-232
The COM ports of the 7522A are given as follows:
COM port Hardware
COM1 80188’s on-chip UART-0, 5-wire RS-232 & 2-wire
RS-485
COM2 80188’s on-chip UART-1, 2-wire RS-485
COM3 16C550, I/O expansion bus, 5-wire RS-422
7521/2/2A/3/4/7 Series Hardware User’s Manual, Ver. 1.5 Sep/2002, 7Mh-001-15 -----51