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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
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
Chapter 2: Motherboard information
COM6
RI
CTS
RTS
DSR
GND
DTR
TXD
RXD
DCD
PIN 1
COM5
RI
CTS
RTS
DSR
GND
DTR
TXD
RXD
DCD
PIN 1
COM3
RI
CTS
RTS
DSR
GND
DTR
TXD
RXD
DCD
PIN 1
COM4
RI
CTS
RTS
DSR
GND
DTR
TXD
RXD
DCD
PIN 1
LPT
SLCT
GND
PE
GND
BUSY
GND
ACK#
GND
PD7
GND
PD6
GND
PD5
GND
PD4
GND
PD3
SLIN#
PD2
INIT#
PD1
ERR#
PD0
AFD
STB#
PIN 1
2-25
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