Kontron AT8904 - Manual (Page 79)

AT8904M Software Description
Page 4 - 13 AT8904M User Guide
Table 4-4: Additional AT8904M sensors (Mezzanine)
4.4.1.1 IPMB Link Sensor
The AT8904M provides two IPMB links to increase communication reliability to the shelf man-
ager and other IPM devices on the IPMB. These IPMB links work together for increased
throughput where both busses are actively used for communication at any time. A request
might be received over IPMB Bus A, and the response is sent over IPMB Bus B. Any requests
that time out are retried on the redundant IPMB bus. In the event of any link state change, the
events are written to the AT8904M SEL. The IPMC monitors the bus for any link failure and iso-
lates itself from the bus if it detects that it is causing errors on the bus. Events are sent to signal
the failure of a bus or, conversely, the recovery of a bus.
4.4.1.2 FRU Hot Swap
The hot swap event message conveys the current state of the FRU, the previous state, and a
cause of the state change as can be determined by the IPMC. Refer to PICMG 3.0 Specifica-
tions for further details on the hot swap state.
4.4.1.3 Fabric Presence Sensor
The FPS indicates if an optional Extension Fabric Mezzanine is present.
4.4.1.4 CPU Status
The CPU Status is set if the PPC experiences a machine check error.
4.4.1.5 POSTCODE
The IPMC has access to the POSTCODE registers in the CPLD. Refer to chapter 4.3.1.2 (Boot
Steps).
Ver change discrete On/Off No change
IPMI Sensor Name Unit
Scanning Enabled Under
Power State
Health LED/Sensor
Temp Mezz. Area degrees C On Exceeds critical threshold
Vcc 1.25v Mezz. Volts On Exceeds critical threshold
Vcc 2.5v Mezz. Volts On Exceeds critical threshold
Vcc 3.3v Mezz. Volts On Exceeds critical threshold
Vcc 12v Mezz. Volts On Exceeds critical threshold
Table 4-3: AT8904M sensors (continued)
IPMI Sensor Name Unit
Scanning Enabled Under
Power State
Health LED/Sensor