MS-7520 Mainboard
2-22
PIN SIGNAL DESCRIPTION
1 HD_LED + Hard disk LED pull-up
2 FP PWR/SLP MSG LED pull-up
3 HD_LED - Hard disk active LED
4 FP PWR/SLP MSG LED pull-up
5 RST_SW - Reset Switch low reference pull-down to GND
6 PWR_SW + Power Switch high reference pull-up
7 RST_SW + Reset Switch high reference pull-up
8 PWR_SW - Power Switch low reference pull-down to GND
9 RSVD_DNU Reserved. Do not use.
JFP1 Pin Definition
Front Panel Connectors: JFP1, JFP2
These connectors are for electrical connection to the front panel switches and LEDs.
The JFP1 is compliant with Intel
®
Front Panel I/O Connectivity Design Guide.
PIN SIGNAL DESCRIPTION
1 GND Ground
2 SPK- Speaker-
3 SLED Suspend LED
4 BUZ+ Buzzer+
5 PLED Power LED
6 BUZ- Buzzer-
7 NC No connection
8 SPK+ Speaker+
JFP2 Pin Definition
1
2
9
10
JFP1
HDD
LED
Reset
Switch
Power
LED
Power
Switch
+
+
+
-
-
-
7
8
Power
LED
Speaker
1
2
JFP2
-
-
+
+
Serial Port Connector: JCOM1
This connector is a 16550A high speed communication port that sends/receives 16
bytes FIFOs. You can attach a serial device.
PIN SIGNAL DESCRIPTION
1 DCD Data Carry Detect
2 SIN Serial In or Receive Data
3 SOUT Serial Out or Transmit Data
4 DTR Data Terminal Ready
5 GND Ground
6 DSR Data Set Ready
7 RTS Request To Send
8 CTS Clear To Send
9 RI Ring Indicate
Pin Definition
JCOM1
1 9
2
10
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