Kontron AdvancedTCA AT8001 User Manual page 55

2.17.2 Serial POST Codes
Kontron's serial POST Code display module (T2603) can be used with this board. The module is
plugged on J13 or on the RTM RT8000 if available. It can display the BIOS POST codes (i.e. content
of I/O locations 80-81h) or the IPMC POST codes depending on the presence of jumper JP7(1-2).
IPMC POST codes are only 8-bit and they are displayed with a "db" prefix (ex.: dbA4 for post A4h).
Also, a hardware status is displayed when the reset-switch is pressed. In this case, the code
displayed has the meaning defined below.
T2603
Dependencies between supplies are as follow:
1. 12V, 5V and 1.8V start with no conditions
2. 3.3V starts when 1.8V is stable
3. 1.5V starts when 3.3V is stable
4. VTT starts when 12V and 1.5V are stable
5. 2.5V starts when 12V and 3.3V are stable
6. Vcore starts after a delay when 12V is stable
If the boot sequence fails or the CPU hangs, the postcode blinker remains operational and repeats
indefinitely the last postcode blink sequence defined below.
2.17.3 User LED 1 and 2
A status LED can be very useful for software development and for system level troubleshooting.
Consult register 0x19A description for software usage (Appendix C). All the LEDs are available by
IPMI has define in the PICMG specification 3.0
Digit Bit Description
3 SKTOCC# (0 = CPU present)
0 2 CPU_VTTEN (0 = wrong type of Xeon)
LSB 1 BSEL1
0 BSEL0
3 JP7
2 JP7
1
1 SUSPEND#
0 Vcore ok
3 VTT (1.2V) ok
2 1.5V ok
2
1 1.8V ok
0 2.5V ok
3 3.3V ok
3 2 5V ok
MSB
1 12V ok
0 3.3Vsus ok
2-37
0123 4567 89AB
0000 0000 1111
0000 1111 0000
0011 0011 0011
0101 0101 0101
0000 0000 1111
0000 1111 0000
0011 0011 0011
0101 0101 0101
0000 0000 1111
0000 1111 0000
0011 0011 0011
0101 0101 0101
0000 0000 1111
0000 1111 0000
0011 0011 0011
0101 0101 0101
AT8001 User's Guide
CDEF
1111
1111
0011
0101
1111
1111
0011
0101
1111
1111
0011
0101
1111
1111
0011
0101