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System Monitoring and Control
6.1
®
Intel
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The ZT 5515 performs system control and monitoring functions using an Intel Baseboard
Management Controller (BMC) ASIC, the VT22030A. The BMC has the following features:
•
IPMB_PWR delivers 5VDC (1A/pin) to the BMC; other required voltages are derived from
this power source.
•
Power ramping controls inrush current and avoids glitching the IPMB power rail.
•
On power-up, the BMC is held in reset until power is stable.
•
A 1024K x 8 flash device and a 32K x 8 SRAM device are used for code and data storage.
•
Six IPMI-compliant Interfaces are available.
In the event IPMB Power is not available, the BMC will draw power from BP_VCC to allow
backward compatibility. The BMC and all its local monitoring devices are powered from the IPMB
Power source allowing the BMC to monitor and control the local CPU without backplane or local
power.
Monitoring and Control Functions
The BMC tracks the heartbeat of the Host CPU by monitoring several parameters on the ZT 5515.
Most of these parameters are measured by the Analog Devices, ADM1026, System Monitoring
Device. Monitoring and control functions are listed below.
Monitoring Functions
•
Onboard Power Supplies, +3.3 V, +5 V, +12 V, and –12 V supplies.
•
Chipset and memory power supplies : +2.5 V, +1.25 V, +1.8 V, +1.5 V
•
CPU Core Supply
•
Onboard and CPU Temperatures
•
CPU VID Lines
•
Eject signals from front- and rear-panel
•
Global Addressing Bits GA[0:4]
•
SIO Low Frequency Clock (Real Time Clock Monitoring Frequency from SIO)
•
Power Ok
•
Hot swap controller fault condition
•
Back end Power Fail and Power Degrade signals
•
SMBUS Alert signals
•
PCI_PRESENT#, SYSSLOT#, BDSEL# for dual domain mode support
Control Functions
•
CPU board Reset Control
TM
ZT 5515 Compute Processor Board Technical Product Specification
System Monitoring and Control
6
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