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LS-37L User’s Manual
-17-
COM2
: RS232 9-pin header
Pin
Signal
Pin
Signal
1
DCD/ 422TX-/ 485-
2
RXD/ 422TX+/ 485+
3
TXD/ 422RX+
4
DTR/ 422RX-
5
GND
6
DSR
7
RTS
8
CTS
9
RI
COM3/4
: RS232/422/485 20-pin header (Pitch 2.54 x 1.27mm)
Pin
Signal
Pin
Signal
1
DCD1/ 422TX-/ 485-
2
RXD1/ 422TX+/ 485+
3
TXD1
4
DTR1
5
GND
6
DSR1/ 422RX+
7
RTS1
8
CTS1/ 422RX-
9
RI1
10
NC
11
DCD2/ 422TX-/ 485-
12
RXD2/ 422TX+/ 485+
13
TXD2
14
DTR2
15
GND
16
DSR2/ 422RX+
17
RTS2
18
CTS2/ 422RX-
19
RI2
20
Key
COM3/4
RS-232/422/485 can set by BIOS.
You can find the setting from
On
Front Page
screen, click Setup Utility
On
Advenced
screen, click SIO NCT6116D
Then click RS232/RS422/RS485 Setting
RS232/RS422/RS485 Setting
Input
Disable
Input/Output mode
Output
Enable RS232/RS422/RS485 Setting
High
RS422/RS485
PEI Phase Output value
Low
RS232
(Default)
High
RS422/RS485
Dxe Phase Output value
(After PEI Phase)
Low
RS232
(Default)
PEI
:
Pre-EFI Initialization,
DXE
: Driver Execution Environment