Functional Description CP3002
Page 2 - 10 ID 1042-9252, Rev. 2.0
P R E L I M I N A R Y
How to Read the 8-Bit POST Code
Due to the fact that only 4 bits are available and 8 bits must be displayed, the POST code output
is multiplexed on the General Purpose LEDs.
The following is an example of the General Purpose LEDs’ operation if the POST configuration
is enabled (see also Table 2-4, “General Purpose LED Function”).
2.11.2 DIP Switch SW1
The CP3002 is equipped with one 4-bit DIP switch, SW1, used for board configuration.
Table 2-5: POST Code Sequence
STATE GENERAL PURPOSE LEDs
0 All LEDs are OFF; start of POST sequence
1 High nibble
2 Low nibble; state 2 is followed by state 0
Table 2-6: POST Code Example
LED3 LED2 LED1 LED0 RESULT
HIGH NIBBLE
off (0) on (1) off (0) off (0) 0x4
LOW NIBBLE
off (0) off (0) off (0) on (1) 0x1
POST CODE
0x41
Note ...
Under normal operating conditions, the General Purpose LEDs should not re-
main lit during boot-up. They are intended to be used only for debugging purpos-
es. In the event that a General Purpose LED lights up during boot-up and the
CP3002 does not boot, please contact Kontron for further assistance.
Table 2-7: DIP Switch SW1 Function
SWITCH FUNCTION
1 POST code indication on LED0..3
2 SPI flash boot configuration
3 Reset configuration
4 Clear uEFI BIOS settings
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