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5.1.4
PWR_OK Signal
With the PWR_OK signal on the feature connector (X34), the user can control the SBC's start-up process. When this signal is set to low, the SBC
is kept in reset until the PWR_OK signal is asserted.
When the signal is asserted (set to high), it indicates to the SBC that the supplied power is stable. The SBC then begins its onboard power-up
sequence.
5.1.5
Power Status LEDs
The conga-IA3 provides two LED signals (FP_LED1 and P_LED2) on pins 2 and 4 of the front panel connector X38. The signals indicate the
different power states of the conga-IA3. Possible states and corresponding activity of the LEDs are shown below:
Double-Color Power LED
LED State
Description
ACPI State
Off
Power-off
S5
Steady Green
Running
S0
Steady Yellow
Sleeping
S3
Single-Color Power LED
LED State
Description
ACPI State
Off
Sleeping or power-off (not running)
S3, S5
Steady Green
Running
S0
Note
For the front panel pinout description, see section 6.1 “Front Panel Connector”.
