Voltage Sensor
Sensor
Number
Normal LCT LNCT UNCT UCT
P3V3_STBY 36h 3.3V 3.072V 3.136V 3.456V 3.520V
P3V3 35h 3.3V 3.072V 3.136V 3.456V 3.520V
P5V 32h 5V 4.67V 4.76V 5.25V 5.34V
P12V 34h 12V 11.21V 11.40V 12.6V 12.78V
P1V8_AUX 33h 1.8V 1.68V 1.71V 1.89V 1.92V
P1V5_ICH 31h 1.5V 1.40V 1.43V 1.56V 1.60V
FAN Control and Monitoring
Fan Speed Monitoring
AST2050 senses all fans in threshold base through its internal or external tachometer sensor W83793G. All of sensors
support LNCT and LCT assertion and de-assertion. Thermal engineers also need to define these values. Below is the table
of fan speed thresholds.
Fan Sensor
Sensor
Number
Normal LCT LNCT UNCT UCT
System FAN 1 51h N/A 1500 2000 N/A N/A
System FAN 2 52h N/A 1500 2000 N/A N/A
PCI FAN 50h N/A 1500 2000 N/A N/A
Bus Error Detection
PCI Bus Error Detection
This feature will be done by BIOS. BIOS will record events in SEL.
Memory Bus Error Detection
This feature will be done by BIOS. BIOS will record events in SEL.
QPI Error Detection
This feature will be done by BIOS. BIOS will record events in SEL.
Processor Error Detection
Thermal Trip / Processsor Hot
Thermal Trip and Processor Hot can be detected by GPIO. When error is detected, the event will be added to SEL and the
supported action will be executed in PEF.
Chapter 4 — BMC
75
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