Advantech HMI-640S user manual Serial ports

Table 4-14: PS/2 keyboard connector

PS/2 Keyboard		CN4		PS/2 Keyboard		CN4
Pin	Signal	Pin	Signal	Pin	Signal	Pin	Signal
1	KB_Data	31	KBDT	4	Vcc	29	KBVCC
2	NC	-	-	5	KBCLK	32	KBCK
3	GND	34	GND	6	NC	-	-
Table 4-15: PS/2 mouse connector
PS/2 Mouse		CN4		PS/2 Mouse		CN4
Pin	Signal	Pin	Signal	Pin	Signal	Pin	Signal
1	MDATA	30	MSDT	4	Vcc	29	KBVCC
2	NC	-	-	5	MCLK	33	MSCK
3	GND	34	GND	6	NC	-	-

4.10.4 Serial ports

The CPC-2245N offers two serial ports: COM1 and COM2, both in RS- 232. These ports let you connect to serial devices (a mouse, printers, etc.) or a communication network.

You can select the address for each port (For example, 3F8H [COM1], 2F8H [COM2]) or disable it, using the BIOS Advanced Setup program. Different devices implement the RS-232 standard in different ways. If you are having problems with a serial device, be sure to check the pin assignments for the connector.

The IRQ and address range for both ports are fixed. However, if you wish to disable the port or change these parameters later, you can do this in the system BIOS setup. The table below shows the settings for the CPC-2245N board's ports:

Chapter 4 CPC-2245N Main Borad 53