Artesyn Embedded Technology ATCA-7490, Installation And Use Manual

Page: 142 / 372

Maps and Registers
ATCA-7490 Installation and Use (6806800U11F )
142
The table below shows the failing cause for the ME power failure.
5.1.13.2 Payload Power Failure Registers
When a payload power failure occurs, the red power failure LED is switched ON (signal
PWR_FAIL_ is driven low).
The power failing state is kept until payload power is turned off:

Manual Powering: Setting the switch, SW100.1 from ON to OFF.

IPMC controlled powering: The IPMC shut down the payload power (signal
IPMC_VP48_EN_ is deasserted).
Table 5-48 ME Power Failure Cause Register
Address Offset: 0x09
Bit Description Default Access
0 Active Sleep Well (ASW) power failure:
0: No ASW power failure. ASW power is as expected.
1: ASW power failure. ASW power has different value
as expected.
Note : Only valid when ME Failure (Bit 7) of ME Power
Failure State Register ( Table 5-49 ) is set.
PWR_GOOD:0 IPMC: r
7:1 Reserved 0 IPMC: r
Table 5-49 Payload Power Failure State Register
Address Offset: 0x0A
Bit Description Default Access
4:0 Payload Power Failure State. Latched last Payload
Power state when failure occurred. See
Table
5-50 .
Note : Only valid with Payload Failure (Bit 7) is set.
PWR_GOOD:0 IPMC: r
6:5 Reserved 0 IPMC: r