Physical Layout
Lion (VL-EPMe-42) Reference Manual
18
Figure 12. Location of SW1 Configuration Switch Block
Table 6. Switch Setting Summary
SW1
Switch
Position
Description
Position 1
Clear CMOS RAM and Clears Real-Time Clock
Off
–
Normal operation (default)
On
–
Clears battery backed up CMOS
Position 2
No Battery Switch
(see Integrator’s Note below)
Off
–
A battery is being used (default)
On
–
A battery is not being used
Position 3
Reset BIOS to factory defaults
Off
– Normal operation (default)
On – Resets BIOS to factory defaults when the board boots.
Position 4
For factory use only. Always leave in the Off position.
Position 5
SPI Flash Security
– Not supported.
Position 6
BIOS select
Off
– Primary BIOS (default)
On – Backup BIOS
Integrator’s Note:
If a battery is installed
(on the CBR-4005 paddleboard or externally using the J12
connector), switch position 2 must be set to the Off position. If it is set to On, the battery will
discharge quickly.
If you do not use a battery
, switch position 2 should be set to the ON position. Otherwise,
boot times could increase (by as much as 30 seconds in low temperature environments).
