Functional Description
232 Datasheet
A 2-byte read would provide both the PCH and processor temperature. A device that
wants DIMM information would read 9 bytes.
Table 5-54. Block Read Command – Byte Definition
Byte Definition
Byte 0
Processor Package temperature, in absolute degrees Celsius (C). This is not
relative to some max or limit, but is the maximum in absolute degrees.
If the processor temperature collection has errors, this field will be FFh.
Read value represents bits [7:0] of PTV (Processor Temperature Value)
Byte 1
The PCH temp in degrees C.
FFh indicates error condition.
Read value represents bits [7:0] of ITV (Internal Temperature Values)
Register described in Section 22.2.
NOTE: Requires TRC (Thermal Reporting Control) Register bit [5] to be
enabled. See Section 22.2.
Byte 3:2 Reserved
Byte 4 Reserved
Byte 5
Thermal Sensor (TS) on DIMM 0
If DIMM not populated, or if there is no TS on DIMM, value will be 0h
Read value represents bits[7:0] of DTV (DIMM Temperature Values) Register
described in Section 22.2.
NOTE: Requires TRC (Thermal Reporting Control) Register bit [0] to be
enabled. See Section 22.2.
Byte 6
Thermal Sensor (TS) on DIMM 1
If DIMM not populated, or if there is no TS on DIMM, value will be 0h
Read value represents bits[15:8] of DTV (DIMM Temperature Values)
Register described in Section 22.2.
NOTE: Requires TRC (Thermal Reporting Control) Register bit [1] to be
enabled. See Section 22.2.
Byte 7
Thermal Sensor (TS) on DIMM 2
If DIMM not populated, or if there is no TS on DIMM, value will be 0h.
Read value represents bits[23:16] of DTV (DIMM Temperature Values)
Register described in Section 22.2.
NOTE: Requires TRC (Thermal Reporting Control) Register bit [2] to be
enabled. See Section 22.2.
Byte 8
Thermal Sensor (TS) on DIMM 3
If DIMM not populated, or if there is no TS on DIMM, value will be 0h.
Read value represents bits[31:24] of DTV (DIMM Temperature Values)
Register described in Section 22.2.
NOTE: Requires TRC (Thermal Reporting Control) Register bit [3] to be
enabled.
Byte 9
Sequence number. Can be used to check if the PCH's FW or HW is hung. See
Section 5.21.2.9 for usage.
This byte is updated every time the collected data is updated
Read value represents bits[23:16] of ITV (Internal Temperature Values)
Register described in Section 22.2.
Byte 19:10 Reserved
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