Intel 7140N LF80550KF093007 Data Sheet

Dual-Core Intel® Xeon® Processor 7100 Series Datasheet

115

The contents of the Conversion Rate Registers determine the nominal rate at which 
analog-to-digital conversions happen when the SMBus thermal sensor is in auto-
convert mode. There are two Conversion Rate Registers: address 04h for reading the 
conversion rate value; and address 0Ah for writing the value. 

 shows the 

mapping between Conversion Rate Register values and the conversion rate. As 
indicated in 

, the Conversion Rate Register is set to its default state of 1000b 

(16 Hz nominally) when the thermal sensor is powered up.

 

There is a ±30% error 

tolerance between the conversion rate indicated in the conversion rate register and the 
actual conversion rate.

4

RESERVED

RESERVED

Reserved for future use.

3

Remote 1/2

0

Setting this bit to 1 enables the user to read the 

processor core 2 values from the processor core 1 

registers. Default = 0 means Read processor core 1 

values from the processor core 1 registers. Always set 

this bit to 0.

2

Temp Range

0

Setting this bit to 1 enables the extended temperature 

measurement range (-50 °C to +150 °C). Default = 0 = 

(0 °C to 127 °C). Always set this bit to 0.

1

Mask R1

0

Setting this bit to 1 masks ALERTS due to the processor 

core 1 temperature exceeding a programmed limit. 

Default = 0. Always set this bit to 0.

0

Mask R2

0

Setting this bit to 1 masks ALERTS due to the processor 

core 2 temperature exceeding a programmed limit. 

Default = 0. Always set this bit to 0.

7 (MSB)

Averaging

0

Setting this bit to 1 disables averaging of the 

temperature measurements at the slower conversion 

rates. Default = 0 = Averaging enabled.