AAEON EMB-H81A - Manual (Page 33)

2-25 Chapter 2: Motherboard information
12. Serial port connectors (10-1 pin COM3 ~ COM6)
These connectors are for serial (COM) ports. Connect the serial port module
cables to these connectors, then install the module to a slot opening at the
back of the system chassis.
EMB-H81A Serial port connectors
PIN 1
COM5
RI
RTS
GND
TXD
DCD
CTS
DSR
DTR
RXD
PIN 1
COM3
RI
RTS
GND
TXD
DCD
CTS
DSR
DTR
RXD
PIN 1
COM4
RI
RTS
GND
TXD
DCD
CTS
DSR
DTR
RXD
PIN 1
COM6
RI
RTS
GND
TXD
DCD
CTS
DSR
DTR
RXD
13. LPT connector (26-1 pin LPT)
The LPT (Line Printing Terminal) connector supports devices such as a
printer. LPT is standardized as IEEE 1284, which is the parallel port interface
on IBM PC-compatible computers.
EMB-H81A Parallel Port Connector
LPT
PIN 1
SLCT
PE
BUSY
ACK#
PD7
PD6
PD5
PD4
PD3
PD2
PD1
PD0
STB#
GND
GND
GND
GND
GND
GND
GND
GND
SLIN#
INIT#
ERR#
AFD