Serial Port Connector: Jcom 2; Aux Line-In Connector: Jcd1; S/Pdif-Out Connector: Jspdifout1 (Optional) - MSI P4M900M2 Series User Manual

M S-7255 M ainboard

Serial Port Connector: JCOM 2

The mainboard provides one 9-pin header as serial port JCOM 2. The port is a 16550A
high speed communication port that sends/receives 16 bytes FIFOs. You can attach
a serial mouse or other serial devices directly to it.
JCOM2
1 2
9

Aux Line-In Connector: JCD1

The connector is for DVD add-on card with Line-in connector.
S/PDIF-Out Connector: JSPDIFOUT1 (2pin / 3pin optional)
This connector is used to connect S/PDIF (Sony & Philips Digital Interconnect Format)
interface for digital audio transmission. 2pin header is used to connect to the HDMI
graphics card. 3pin header is used to connect to the SPDIF optional bracket.
JSPDIFOUT1
2-14
Pin Definition
PIN SIGNAL
1 DCD
2 SIN
3 SOUT
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
GND
L
JCD1
GND
(optional)
SPDF0
DESCRIPTION
Data Carry Detect
Serial In or Receive Data
Serial Out or Transmit Data
Data Terminal Ready
Ground
Data Set Ready
Request T o Send
Clear To Send
Ring Indicate
R
GND
SPDIF
VCC