User manual

13 ARK-6320 User Manual
Chapter 3 Motherboard Overview
3.4.2 CMOS Clear (CMOS1)
The motherboard contains a jumper that can erase CMOS data and reset the system
BIOS information. Normally this jumper should be set with pins 1-2 closed. If you
want to reset the CMOS data, set J1 to 2-3 closed for just a few seconds, and then
move the jumper back to 1-2 closed. This procedure will reset the CMOS to its
default setting.
3.4.3 COM2 RS 232/422/485 Mode Selector (JSETCOM2)
Users can use JSETCOM2 to select among RS 232/422/485 modes for COM2. The
default setting is RS 232.
Table 3.3: CMOS1
Function Jumper Setting
Keep CMOS data (default)
Clear CMOS data
1-2 closed
2-3 closed
Table 3.4: COM2 RS 232/422/485 Mode Selector (JSETCOM2)
Function Jumper Setting
RS232 (default) (5-6) + (7-9) + (8-10) + (13-15) + (14-16) closed
RS422 (3-4) + (9-11) + (10-12) + (15-17) + (16-18) closed
RS-485 (1-2) + (9-11) + (10-12) + (15-17) + (16-18) closed
RS232* RS422 RS485