KONTRON
CMP/P3 and CMP/C3 User’s Guide
27
Serial Communication Interfaces
14.3
Configuration
You can set all serial input/output interfaces to base I/O-addresses 3F8h, 2F8h, 3E8h, or 2E8h. The
modes range from disabled, enabled, and AUTO. You can set COM A and COM B interrupts to IRQ3 or
IRQ4. You can set COM C and COM D interrupts to IRQ 10 and IRQ 11. All settings are changeable
from the BIOS menu. For COM D, your choice of interface includes RS232 (default setting) or RS485.
Refer to the I/O Device Configuration submenu in the Appendix B: BIOS Operation chapter for
information on configuration.
14.4
RS-485 Connector
You can use Connector X18 (COM D) for RS-485 purposes.
Header
Pin
Signal Name
Function
1
4
Channel A positive terminal
2
485_1RXD-
Channel A negative terminal
3
GND
Ground
4
4
Channel B positive terminal
5
485_1TXD-
Channel B negative terminal
The connector for connecting RS485 to COOLMONSTER/P3 or COOLMONSTER/C3 is from
manufacturer JST. For mating connector information see Appendix E: Connector Layout.
14.5
Configuration
You can choose IRQ 10 or 11 for COM D (RS-485). You can set COM D to one of the following base
I/O-addresses: 3F8h, 2F8h, 3E8h, or 2E8h. Refer to the I/O Device Configuration submenu in the
Appendix B: BIOS Operation chapter for additional information on configuration.
