Bmc Key Features And Functions; Power System - QUANTA QSSC-S99K 2U User Manual

LPC Interface
AST2050 has an on-chip LPC interface. The LPC performs serial transfer of cycle type, address, and data, synchronized with
the 33 MHz PCI clock. It uses four signal lines for address/data, and one for host interrupt requests. Various kinds of cycle
are available for the LPC interface, but the chip's LPC supports only I/O read cycle and I/O write cycle transfer. It is also
provided with power-down functions that can control the PCI clock and shut down the host interface. For IPMI application,
LPC provides hardware path for KCS interface.
UART Interface
AST2050 has two independent UART interfaces. One full function UART port and one Tx/Rx only port for firmware
debugging purpose.
General Purpose I/O
AST2050 has 46 shared GPIO pins; all of them can be configured as the triggering source of external interrupt.

BMC key Features and Functions


Support IPMI v1.5 and v2.0

Out-of-band monitoring and control for sever management over LAN.

Dedicated 10/100 NIC in AST2050 for remote management via network

FRU information report includes main board part number, product name, and manufacturer, etc.)

Health status/Hardware monitoring report.

Events log, view, and clear.

Event notification via lighting chassis LED indicator and PET (Platform Event Trap).

Platform Event Filtering (PEF) to take selected action for selected events.

Chassis management includes power control and status report, front panel buttons and LEDs control.

Watchdog and auto server re-start and recovery

Support multi-session user, and alert destination for LAN channel.

Support IPMB connecter that advanced server management card can communicate with BMC.

Power System

BMC controls system power and front panel through GPIO pins and IPMI chassis commands.
Power Control
The BMC supports two power supply control signals: Power On and Power Good. The Power On signal connects to the
chassis power subsystem through the chipset and is used to request power state changes. Power Good is a signal from the
chassis power subsystem indicating current power state.
BMC uses the Power Good signal to monitor whether the power supply is on and operational, and to confirm whether the
actual system power state matches the intended system on/off power state that was commanded with the Power On signal.
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Chapter 4 — BMC