Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown
Datasheet
6.2
Temperature Data Registers
Table 6.2 Temperature Data Registers
B7 B6 B5 B4 B3
64 32 16
ADDR
R/W
REGISTER
B2
B1
B0
DEFAULT
Internal Diode
High Byte
00h
R
Sign
0.5
8
4
2
1
00h
Internal Diode
Low Byte
01h
02h
R
R
0.25
0.125
-
-
-
-
-
00h
External
Diode 1 High
Byte
Sign
400
0.5
64
32
100
16
50
-
8
25
-
4
13.5
-
2
6.25
-
1
3.125
-
00h
00h
00h
VIN1
200
0.25
External
Diode 1 Low
Byte
03h
04h
05h
06h
R
R
R
R
0.125
External
Diode 2 High
Byte
Sign
400
0.5
64
32
100
16
50
-
8
25
-
4
13.5
-
2
6.25
-
1
3.125
-
00h
00h
00h
VIN2
200
0.25
External
Diode 2 Low
Byte
0.125
External
Diode 3 High
Byte
Sign
400
0.5
64
32
100
16
50
-
8
25
-
4
13.5
-
2
6.25
-
1
3.125
-
00h
00h
00h
VIN3
200
0.25
External
Diode 3 Low
Byte
07h
08h
09h
R
R
R
0.125
External
Diode 4 High
Byte
Sign
0.5
64
32
16
-
8
-
4
-
2
-
1
-
00h
00h
External
Diode 4 Low
Byte
0.25
0.125
The temperature measurement range is from -64°C to +128°C. The data format is a signed two’s
complement number as shown in Table 6.3.
APPLICATION NOTE: When each of the External Diode 1, External Diode 2, or External Diode 3 channels are
configured as a voltage input, the voltage data will be stored in the corresponding data
register. Each bit weight represents XmV of resolution so that the final voltage can be
determined by adding the appropriately set bits together. This data will be compared against
the limits normally (see Section 6.19).
Revision 1.74 (05-08-08)
SMSC EMC2104
DATA5S0HEET
SMSC [ SMSC CORPORATION ]
