82551QM Datasheet, PDF (52/120 Pages) Intel Corporation – Fast Ethernet Multifunction PCI/CardBus Controller

82551QM — Networking Silicon
The 82551QM provides 128 user defined alerts to monitor system hardware. The 82551QM
supports SMB, version 2.0 sensors along with eight SMB, version 1.0 sensors as stated in the ASF
specification. Some common SMB, version 1.0 sensors available on the market:
• Voltage
• Temperature
• Fan Tach
In addition, Intel’s 82551QM includes support for the following remote control operations:
• Presence ping/pong
• System capability request/response
• System state request/response
• Power up
• Unconditional power down
• Reset and power cycle reset
• Boot path definitions
— NOP
— Force PXE boot
— Force hard drive boot
— Force diagnostic boot
— Force CD/DVD boot
8.2
Heartbeat
82551QM can be configured to send a heartbeat packet periodically. The heartbeat period (10.7
seconds to 23 minutes) is controlled by the heartbeat timer. Heartbeat and Ping/Pong are mutually
exclusive features. 82551QM can also send a heartbeat packet in response to an ICH event.
8.3
Ping/Pong
Upon receiving a “presence ping” packet, 82551QM replies with a “presence pong” packet.
Heartbeat and Ping/Pong are mutually exclusive features. This feature can be enabled remotely
through a management packet.
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Datasheet