MPC152-832
User’s Manual
Hardware and Installation
13
2.2.3 Auto Power On (JP4)
If JP4 is enabled for power input, the system will be automatically power on without pressing
soft power button. If JP4 is disabled for power input, it is necessary to manually press soft
power button to power on the system.
2.2.4 Restore BIOS Optimal Defaults (JP6)
Put jumper clip to pin 2-3 for a few seconds then move it back to pin 1-2. Doing this procedure
can restore BIOS optimal defaults.
2.2.5 COM port Connector
The pin assignment of RS-232/RS-422/RS-485 is listed on the following table. If you need
COM1 port to support RS-422 or RS-485 mode, please refer to Jumper Settings
Function
Setting
Enable auto power on
1-2 close
Disable auto power on
(Default)
2-3 close
Function
Setting
Normal operation (Default)
1-2 close
Restore BIOS optimal defaults
2-3 close
Pin
RS-232
RS-422
RS-485
1
DCD
TX-
Data-
2
RXD
TX+
Data+
3
TXD
RX+
No use
4
DTR
RX-
No use
5
GND
GND
GND
6
DSR
No use
No use
7
RTS
No use
No use
8
CTS
No use
No use
9
RI
No use
No use
