Artesyn Embedded Technology ATCA-7540, Installation And Use Manual, Page: 132 / 324

Maps and Registers
132 ATCA-7540 Installation and Use (6806871A01A )
5.1.11.1 ME Power Failure Registers
When an ME failure occurs, the red power failure LED (signal PWR_FAIL_) starts blinking. (The
LED is one second ON and one second OFF).
The error state is kept until ME wakes up (signal SLP_A_ becomes high).
The table below shows all possible failing states and their coding.
Table 5-44. ME Power Failure State Register
Address Offset: 0x08
Bit Description Default Access
2:0
ME Power Failure State. Latched last ME state when
failure occurred. See
Table 5-48
ME Power Failure
States.
Note: Only valid with ME Failure (Bit 7) set
PWR_GOOD:0 IPMC: r
6:3 Reserved 0 IPMC: r
7
ME Failure. ME state machine sampled a failing ME
Power status:
0: No ME Failure. Normal ME operation.
1: ME failure. ME failure detected.
PWR_GOOD:0 IPMC: r
Table 5-45. ME Power Failure States
State
Coding State
Name
Description
0 ME_OFF
Timeout. ASW power good for more than 45ms also
ME is in ME_OFF state.
2 ME_ON ASW power good lost
3 ME_PWR Timeout. No ASW power good after 45 ms
4 ME_WAIT ASW power good lost
5 ME_WAIT_OFF ASW power good lost
Other - These values will never occur