23 lpt/ digital i/o port connector (cn12) – AAEON AEC-6637 User Manual
Page 37
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E m b e d d e d C o n t r o l l e r
A E C - 6 6 3 7
Chapter 2 Hardware Installation
2 - 22
RS-485
Pin
Pin Name
Signal Type
Signal Level
1 RS485_D-
I/O
±5V
2 NC
3 NC
4 NC
5 RS485_D+
I/O
±5V
6 NC
7 NC
8 NC/+5V/+12V PWR +5V/+12V
9 GND GND
Note:
COM2 RS-232/422/485 can be set by BIOS setting. Default is
RS-232. Pin 8 function can be set by JP8.
2.23 LPT/ Digital I/O Port Connector (CN12)
LPT Mode
STROBE#
1
2
25
26
AFD#
ERROR#
PRINT#
SLIN#
GND
GND
GND
GND
GND
GND
GND
GND
N.C
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
ACK#
BUSY
PE
SLCT
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