Intel 7140N LF80550KF093007 Data Sheet
Product codes
LF80550KF093007
Features
112
Dual-Core Intel® Xeon® Processor 7100 Series Datasheet
Notes:
1.
Bit 3 of Configuration register 1 must be set to 0 (default value is 0).
2.
Writing to RESERVED bits may cause unexpected results. RESERVED bits that must be correctly
programmed are identified in the register definitions in the following section. Reading from RESERVED bits
will return unknown values.
3.
The 4 least significant bits of the thermal sensor die revision code may change and should not be used for
identification.
are for reading or writing registers in the SMBus
thermal sensor, except the one-shot register (0Fh). The one-shot command forces the
immediate start of a new conversion cycle. If a conversion is in progress when the one-
shot command is received, then the command is ignored. If the thermal sensor is in
stand-by mode when the one-shot command is received, a conversion is performed
and the sensor returns to stand-by mode. The one-shot command is not supported
when the thermal sensor is in auto-convert mode.
immediate start of a new conversion cycle. If a conversion is in progress when the one-
shot command is received, then the command is ignored. If the thermal sensor is in
stand-by mode when the one-shot command is received, a conversion is performed
and the sensor returns to stand-by mode. The one-shot command is not supported
when the thermal sensor is in auto-convert mode.
Note:
Writing to a read-command register or reading from a write-command register will
produce invalid results.
Table 7-13. SMBus Thermal Sensor Command Byte Bit Assignments
Register
Command
R/W
Lock
4
Reset State
RESERVED
2
00h
N/A
N/A
RESERVED
Ch. 1 Temp. Value
1
01h
R
N
0000 0000
Status Register 1
02h
R
N
Undefined
Configuration Register 1
03h
R
Y
0000 0000
Conversion Rate Register
04h
R
Y
0000 0111
RESERVED
2
05h - 06h
N/A
N/A
RESERVED
Ch. 1 Temp. High Limit
1,4
07h
R
Y
0101 0101
Ch. 1 Temp. Low Limit
1,4
08h
R
Y
0000 0000
Configuration Register
09h
W
Y
0000 0000
Conversion Rate Register
0Ah
W
Y
0000 0111
RESERVED
2
0Bh - 0Ch
N/A
N/A
RESERVED
Ch. 1 Temp. High Limit
1,4
0Dh
W
Y
0101 0101
Ch. 1 Temp. Low Limit
1,4
0Eh
W
Y
0000 0000
One-shot
0Fh
W
N/A
N/A
RESERVED
2
10h
N/A
N/A
RESERVED
Ch. 1 Temp. Offset
1
11h
R/W
Y
0000 0000
RESERVED
2
12h - 22h
N/A
N/A
RESERVED
Status Register 2
23h
R
N
0000 0000
RESERVED
2
24h - 29h
N/A
N/A
RESERVED
Ch. 2 Temp. Value
30h
R
N
0000 0000
Ch. 2 Temp. High Limit
4
31h
R/W
Y
0101 0101
Ch. 2 Temp. Low Limit
4
32h
R/W
Y
0000 0000
RESERVED
2
33h
R
N/A
0000 0000
Ch. 2 Temp. Offset
34h
R/W
Y
0000 0000
RESERVED
2
35h - FDh
N/A
N/A
RESERVED
Manufacturer ID
FEh
R
N/A
0100 0001
Die Revision Code
3
FFh
R
N/A
1001xxxx