Physical Layout
Bengal (VL-EPMe-30) Reference Manual
18
Configuration Switches
Figure 11 shows the as-shipped switch configuration with all switches in the Off position. The Off
position is toward the center of the board.
BENGAL_11
6
5
4
3
2
1
Off
On
SW1
Switch
Block
Figure 11. Location of SW1 Configuration Switch Block
Table 5: Switch Setting Summary
SW1
Switch
Position
Description
Position 1
Clear CMOS RAM and Clears Real-Time Clock (see page 21)
Off
–
Normal operation (default)
On
–
Clears battery backed up CMOS memory bytes 0xE-0x7F and clears battery backed
up RTC registers
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 (see page 21)
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-5015 paddleboard or externally using the J8 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).
