Datasheet

Features

86 Dual-Core Intel

Xeon

Processor 7000 Series Datasheet

7.4.6.5 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. Table 7-15 shows the mapping between Conversion Rate

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.

6 RUN/STOP 0 Stand-by mode control bit. If set the device immediately

stops converting, and enters stand-by mode. It will

perform new temperature measurements when a

one-shot is performed. If cleared the device

automatically updates on a timed basis.

5 AL/TH 0 This bit selects the function of pin 13. Default = 0 =

ALERT. Always set this bit to 0.

4 RESERVED RESERVED Reserved for future use.

3 Remote 1/2 0 Setting this bit to 1 enables the user to read the remote

2 values from the remote 1 registers. Default = 0 = Read

remote 1 values from the remote 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 =

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 7-14. SMBus Thermal Sensor Configuration Register (Sheet 2 of 2)

Bit Name Reset State Function

Table 7-15. SMBus Thermal Sensor Conversion Rate Register (Sheet 1 of 2)

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.

6 RESERVED RESERVED Reserved for future use.