User manual

RS-232 connection

• J1 – RS-232 connector with pinout A works with Asus and Intel on-board RS-232 connectors. This is

also the connector used with the Merging Technologies USB to RS-232 adaptor. (see below)

• J3 – RS-232 connector with pinout B is provided for compatibility with motherboards from other

manufacturers.

Note: This connector may not be available on recent revisions of the MTCHIO board.

If in any doubt, please refer to your motherboard User Manual and ensure the on board connector matches

the pinout of either J1 or J3 as shown here:

RS-232 Socket Pinouts

J1 J3

1 NC

2 RX

1 NC 2 NC

3 TX

4 NC

3 RX

4 NC

5 GND

6 NC

5 TX

6 NC

7 NC 8 NC 7 NC 8 NC

9 NC 10 NC

9 GND

10 NC