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Board Layout

Chapter 3

Embedded and Industrial Computing

Switch

Protocol

J10 SC2T1

RS-232 (default) 1-2, 1-5, 2-6, 3-7, 4-8

RS-422 3-4, 5-6 5-9, 6-10, 7-11, 8-12

RS-485 3-4, 7-8 5-9, 6-10

J14, SC2T2: Select COM2 Protocol Setting

RS-232

RS-422

RS-485

Switch

Protocol

SCT3 SCT4

RS-232 (default) 1-2 1-5, 2-6, 3-7, 4-8

RS-422 3-4, 5-6 5-9, 6-10, 7-11, 8-12

RS-485 3-4, 7-8 5-9, 6-10

J11, J9: Select Termination in RS-485 for COM1 and COM2

respectively. We strongly recommend that you disable

termination when the port is configured as RS-232 and

enable it when the port is configured as RS-485/RS-422.

Pin No. Function

1-2, 3-4, 5-6, 7-8 Termination TX, RX

Termination off

J12, J13 : Select COM1 and COM2 Pin No9 (Ring Indicator)

function respectively

JP1

Pin Signal

1-2 RI

3-4 5V

5-6 12V

Note: Besides jumper settings, you should also

select the communication protocol in the BIOS as

shown in the following picture, select Advanced

->F81865 SuperIO Configuration->Serial Port 0/1

Driver->RS232 or RS485

COM3 RS-232 Serial Port (J8)

COM4 RS-232 Serial Port (J7)

SC2T2

J14

J9 (COM2), J11(COM1)

Pin No. Pin Name Pin No. Pin Name

RS-232

1 Data Carrier Detect

(DCDA # )

6 Clear to send

(CTS)

2 Data Set Ready

(DSRA # )

7 Data Terminal Ready

(DTR )

3 Receive Data

(RXD)

8 Ring Indicator

(RI)

4 Request to send

(RTS )

9 GND

5 Transmit Data

(TXD)

Pin No. Pin Name Pin No. Pin Name

RS-232

1 Data Carrier Detect

(DCDA # )

6 Clear to send

(CTS)

2 Data Set Ready

(DSRA # )

7 Data Terminal Ready

(DTR )

3 Receive Data

(RXD)

8 Ring Indicator

(RI)

4 Request to send

(RTS )

9 GND

5 Transmit Data

(TXD)

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 28 29

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