Power775 UEPO Cable Service Procedure
PN: 41U8503, EC N44172
18 of 32
If different data is returned, then contact the next level of support. For reference, the returned “rrssdddddddd” format
hexadecimal characters can be translated as follows:
“rr” Return Code Definitions:
00 = Command executed properly
21 = Cage Not Present / Configured
4A = Error in Sent Command
95 = BPC LIC detected error/failed
“ss” Sequence Number:
aa = Arbitrary and unimportant
“dddddddd” Return Data Definitions:
dd Data
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
1
st
& 3
rd
dd
Bytes
-CROSS
PWR DCVP
Pull-Up
-EPO1 PWR
COMPLETE
-EPO1 PWR
GOOD
BPCH EPO1
BYPASSED
-BPD PLUG
DETECT
-BPF4 PLUG
DETECT
-BPF3 PLUG
DETECT
2
nd
& 4
th
dd
Bytes
<------- Pull-Up ------->
-EPO2 PWR
COMPLETE
-EPO2 PWR
GOOD
BPCH EPO2
BYPASSED
Pull-Up
-BPCH BIAS
2 DCVP
-BPCH BIAS
1 DCVP
Table 5 BPA / UEPO Status Registers
The Return Data needs each “dd” byte converted from hexadecimal to binary and plugged into the appropriate row of
the above Table 5 for translation (Bytes 1 & 2 are BPCH-A status and bytes 3 & 4 are BPCH-B status). A typical value
of “48CC48CC” has only the Pull-Up bits equal to 1 (i.e., forced high due to pull-up resistors), both bit 3’s equal to one
(active high UEPO Bypassed), and all the other bits equal to 0 (i.e., active low as designated by the – sign prefix). This
technical information is supplied strictly as a debug aid and is not expected to be easily understood. If you are not sure
how to proceed, then please call the next level of support.
13.
Issue a UEPO Panel deactivate command to the BPCH FSP. To do this access the
HMC BPC-A ASM SIDE_A
Service Processor Command Line (Refer to ‘Power775 BPC FSP Command Line Procedure’ in Appendix A of this
PDF and ensure
ASM SIDE_A
is active per Step 12) and enter the following at the command prompt
(IMPORTANT: DOUBLE-CHECK THE COMMAND IS TYPED IN EXACTLY CORRECT BEFORE
PRESSING ENTER BECAUSE EVEN A SINGLE INCORRECT CHARACTER COULD RESULT IN SEVERE
UNINTENDED SYSTEM DISRUPTION!!):
bpccmd -c 10aa0000ffef
Expect 00aa00 returned which means the command executed properly
and confirmed successful “Deactivated UEPO Panel” status.
