Datasheet

Dual-Core Intel® Xeon® Processor 7100 Series Datasheet 115
Features
7.4.8.5 Conversion Rate Register
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. Tab l e 7- 18 shows the
mapping between Conversion Rate Register values and the conversion rate. As
indicated in Ta b l e 7- 1 3 , 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.
Table 7-17. SMBus Thermal Sensor Configuration Register (Sheet 2 of 2)
Bit Name Reset State Function
Table 7-18. SMBus Thermal Sensor Conversion Rate Register
Bit Name Reset State Function
7 (MSB) Averaging 0 Setting this bit to 1 disables averaging of the
temperature measurements at the slower conversion
rates. Default = 0 = Averaging enabled.