24 SBC347A 3U VPX Single Board Computer
Publication No. 500-9300527837-000 Rev. A.0
4.5 Reset and Power-up Sequence
A power sequencer monitors the backplane supply voltages and will shut down
the onboard power supplies if the backplane supplies are not within specified
limits.
Once the backplane supplies are within specification, the SBC347A transitions
through its sleep states (S5 to S0) before finally powering up all onboard supplies
and executing BIOS Power On Self Test (POST). The POST status is indicated on
LEDs DS414 to DS421.
The green Power Good LED (DS407) is lit when the backplane and all onboard
supplies are within specification. A Sleep Status LED (DS406) is lit when the
SBC347A is in a sleep state (S3 to S5).
The SBC347A supports the SEQ_IN/SEQ_OUT power sequencing signals (on the
P2 connector pins G13 and G15) in line with other Abaco boards. When connected
in a power-sequencing daisy chain, the onboard power supplies will only power
up when SEQ_IN is asserted or floating high. See
for more details.
4.6 BIOS Setup Utility
Various aspects of the SBC347A’s functionality may be configured through the
BIOS Setup utility. The following sections give a brief overview of the Setup
menus available in the BIOS firmware.
4.6.1 Accessing the Setup Menus
To access the First Boot menu, press the
F7
key as the SBC347A is booting.
To access the setup menus, press the
Delete
key as the SBC347A is booting.
The Main Menu screen is displayed.
