Advantech MIC-5602, User Manual

Page: 22 / 74

MIC-5602 User Manual 10
Voltage Sensors
Four channels from an internal 10-bit ADC converter contained in the ATmega128L
are used to monitor the following voltages:
! CPU core voltage input power (0.75V to 1.30V)
! Payload input power (12V)
! Management power (3.3V)
! VCCP (1.05V)
GPIO Sensors
The MMC firmware registers some discrete sensors reflecting the states of GPIO sig-
nals connected to the AVR MMC. The following binary sensors are implemented on
the MIC-5602, using GPIO pins of the AVR:
! Processor Hot (PROCHOT#): this signal from the Intel CPU can be used as an
input or an output. It will go active (pulled low) when the integrated thermal
diode in the processor detects that a manufacturer-defined maximum operating
temperature is reached. By default, the processor will start throttling (i.e. running
at lower clock speed) thereby reducing its power dissipation when the
PROCHOT# signal is pulled low. The signal is connected to the AVR's PD[6]
GPIO. However, currently there is no plan to signal throttling state by the MMC
(i.e. over IPMI).
! Thermal Trip (THERMTRIP#): The Intel CPU contains a hard-coded threshold
to protect itself from overheating. When the corresponding threshold is reached,
the THERMTRIP# output is activated. This will cause both the 3100 chipset to
enter shutdown state and an interrupt to the MMC (through AVR's PD[7]). The
MMC will send a corresponding sensor event.
2.2.8.4 Logical Sensors
The types of logical sensors are registered by the MMC Management Subsystem.
They are the PCIMG Hot Swap sensor and the BMC watchdog sensor.
Hot Swap Sensors
The AMC module has hot swap capability, which enables the module to be inserted
into or extracted from the carrier board without having to shut down the system, or
allows the module to shut down (intentionally or un-intentionally) without bringing
down the system. The MMC contains a Module Hot Swap sensor which proactively
generates events to enable the Carrier IPMC to perform Hot Swap management for
the AMC module. The following events are supported:
! AMC hot swap handle closed
! AMC hot swap handle opened
! AMC quiesced
BMC Watchdog Sensors
When the BMC watchdog functionality is enabled, the MMC registers an IPMI-
defined BMC watchdog sensor. The BMC watchdog will issue a payload cold reset
command when the watchdog timer expires.
Note! The BMC watchdog timer needs to be enabled, configured and strobed
through IPMI commands.