User Manual

Mini-ITX EMB-9459T Rev.B
Chapter 2 Quick Installation Guide 2 - 15
21 BUSY 22 GND
23 PE 24 GND
25 SELECT 26 N.C
2.20 COM5, COM6, COM4, COM3 RS-232 Serial Port Connector
(CN12, CN13, CN15, CN16)
Pin Signal Pin Signal
1 DCD 2 RXD
3 TXD 4 DTR
5 GND 6 DSR
7 RTS 8 CTS
9 RI 10 N.C
2.21 Digital I/O (CN14)
This connector offers 4-pair of digital I/O functions and address is 2A1H. The
pin definitions are illustrated below:
Pin Signal Pin Signal
1 Digital- IN/OUT 2 Digital- IN/OUT
3 Digital- IN/OUT 4 Digital- IN/OUT
5 Digital- IN/OUT 6 Digital- IN/OUT
7 Digital- IN/OUT 8 Digital- IN/OUT
9 +5V 10 GND
Note:
The max. rating of Pin 1~ Pin 8 is 5V @ 8mA
The max. rating of Pin 9 is 5V @0.5A
The pin definitions and registers mapping are illustrated below:
Address: 2A1H
4 in / 4 out
Pin1 Pin2 Pin3 Pin4 Pin5 Pin6 Pin7 Pin8
GPI 27 GPI 26 GPI 25 GPI 24 GPO 23 GPO 22 GPO 21 GPO 20