Pwr_Ok Signal; Power Status Leds; Table 14 Double-Color Power Led; Table 15 Single-Color Power Led - Congatec conga-IA4 User Manual

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-IA4 provides two LED signals (FP_LED+ and P_LED-) on pins 2 and 4 of the front panel connector X38. The signals indicate the
different power states of the conga-IA4. Possible states and corresponding activity of the LEDs are shown below:
Table 14 Double-Color Power LED
LED State Description
Off
Power-off
Steady Green Running
Steady Yellow Sleeping
Table 15 Single-Color Power LED
LED State Description
Off Sleeping or power-off (not running)
Steady Green Running
Note
For the front panel pinout description, see section 6.1 "Front Panel Connector".
Copyright © 2016 congatec AG
ACPI State
S5
S0
S3
ACPI State
S3, S5
S0
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