AM4100
Functional Description
ID 36126, Rev. 2.0
Page 2 - 9
P R E L I M I N A R Y
How to Read the 8-Bit POST Code
The four User-Specific LEDs have been multiplexed in order to display 8-bit data. The following
is an example of the User-Specific LEDs’ operation if POST configuration is enabled (see also
Table 2-2, “User-Specific LED Function”).
Table 2-3:
POST Code Example
STATE
USER-SPECIFIC LEDs
0
All User-Specific LEDs are OFF; start of POST sequence
1
High nibble
2
Low nibble; state 2 is followed by state 0
Note ...
Under normal operating conditions, the User-Specific LEDs should not remain lit
during boot-up. They are intended to be used only for debug purposes. In the
event that a User-Specific LED lights up during boot-up and the AM4100 does
not boot, please contact the Kontron’s Technical Support.
If all User-Specific LEDs flash red on and off at regular intervals, they indicate
that the processor junction temperature has reached a level beyond which per-
manent silicon damage may occur. Once activated, the overtemperature event
remains latched until a cold restart of the AM4100 is undertaken (all power off
and then on again).
Summary of Contents for AM4100
Page 19: ...AM4100 Introduction ID 36126 Rev 2 0 Page 1 1 Introduction Chapter 1 1 P R E L I M I N A R Y...
Page 57: ...AM4100 Installation ID 36126 Rev 2 0 Page 3 1 Installation Chapter 1 3 P R E L I M I N A R Y...
Page 65: ...AM4100 Configuration ID 36126 Rev 2 0 Page 4 1 Configuration Chapter 1 4 P R E L I M I N A R Y...
Page 89: ...AM4100 NetBootLoader ID 36126 Rev 2 0 Page 5 1 NetBootLoader Chapter 1 5 P R E L I M I N A R Y...
