SDML-WLU0 Series - User Guide, Rev. 1.0
// 58
7.12.6.
Clear CMOS Selection (JP7)
The 2.0 mm pitch "Clear COMS Selection" jumper (JP7) can be used to reset the Real Time Clock (RTC) and drain RTC
well.
The jumper has one position: Pin 1-2 mounted (default position) and Pin 2-3 mounted. More information on setting
the "Clear CMOS Selection" jumper can be found in the following table.
Figure 31: Clear CMOS Selection JP7
Table 39: Pin Assignment JP7
Jumper 1 Position
Description
Pin 1-2
Pin 2-3
X
-
Normal Operation (default position)
-
X
Clear CMOS (board does not boot with the jumper in this position)
“
X’’ = Jumper set (short) and ‘‘-’’ = jumper not set (open)
Do not leave the jumper in position 2-3, otherwise if the power is disconnected, the
battery will fully deplete within a few weeks.
2
3
1
