Advantech HMI-640S user manual CompactFlash interface CN2, Clear Cmos J2

4.7.1 Clear CMOS (J2)

This jumper is used to erase CMOS data and reset system BIOS information.

The procedure for clearing CMOS is:

1.Turn off the system.

2.Short pin 2 and pin 3.

3.Turn on the system. The CMOS is now cleared.

4.Turn off the system. Short pin 1 and pin 2.

5.Turn on the system. The BIOS is now reset to its default setting.

Table 4-2: Clear CMOS (J2)

Function	1-2	2-3
Protect*	Closed	Open
Clear CMOS	Open	Closed

*default setting

4.8CompactFlash interface (CN2)

This socket accepts an IDE-compatible CompactFlash memory card.

The CompactFlash interface uses a primary IDE channel, which should be set as the master channel.

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