52 CR12/CT12, VR12/VP12 UEFI Firmware User's Guide
Publication No. UGCR12V051E Rev. A.0
The optimal default is
Auto
.
The user can individually select the serial port address (IO) and interrupt (IRQ) or
select
Auto
to let the UEFI firmware decide the best setting. If more than one
interrupt is listed the UEFI firmware automatically selects one from the list.
Port Driver
The optimal default is
RS232
.
COM1 and COM2 drivers support different electrical serial interface standards. The
user can select which one matches with his environment.
RS232
Single‐Ended, Single
Driver, Single Receiver, up to 15 m (50 feet)
RS422
Differential, Single Driver, Multiple Receivers, up to 220 m (4,000 feet)
RS485
Differential, Multiple Drivers, Multiple Receivers, up to 220 m (4,000 feet)
NOTE
For more details on driver characteristic refer to SBC Hardware Reference Manual.
4.13.3
Serial Port 2 / 3 Configuration
COM 2 and COM3 have common functionality. Select one of either screen to control
serial port configuration.
Select the
Serial Port 2 /3 Configuration
option from the Advanced screen to jump to
the Serial Port 2 / 3 Configuration screen.
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