User`s manual

22 PCA-6753F User's Manual
2.15.1 RS-232 connection (COM1: CN12)
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.
2.15.2 RS-232/422/485 connection
(COM2: CN10: RS-232; CN11: RS-422/485)
COM2 is an RS-232/422/485 serial port. The specific port type is
determined by jumper settings (JP6), as detailed in Chapter 1.
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 PCA-6753F Series' board's ports:
Table 2-3: Serial port default settings
Port Address Interrupt Default
COM1 3F8, 3E8 IRQ4 3F8
COM2 2F8, 2E8 IRQ3 2F8