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7.3
POST Display
COM Express type:
1-2, 3, 4, 5 or wrong pinout
7.4
Indicator LEDs
Page 36
An LPC based POST display is added for
debugging.
The top two LEDs shows the actual
POST data and a bottom row of four LEDs
shows the address
The POST circuitry allows you to execute the
BIOS step-by-step.
J2 short 2-3 results in single step BIOS
execution. A single step can be executed by
pressing the SW2 mini switch
To the left of the POST display a column of 5
mini LEDs indicate what type of COM Ex-
press module is installed on Express-BASE.
A row of mini LEDs to the left of the POST
display indicate the following:
LED 20 5Vsb: ATX power attached
on standby or active
LED2
HDD: Hard disk activity
(SATA and PATA)
LED21 WDT: programmable LED to debug
watchdog during count down
Express-BASE User's Manual
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