RPM-Based Fan Controller with HW Thermal Shutdown
Datasheet
Table 6.3 Temperature Data Format (continued)
HEX (AS READ BY
REGISTERS)
TEMPERATURE (°C)
BINARY
65
127
0100_0001_000b
0111_1111_000b
0111_1111_111b
41_00h
7F_00h
7F_E0h
127.875
6.3
Critical/Thermal Shutdown Temperature Register
Table 6.4 Critical/Thermal Shutdown Temperature Register
ADDR
R/W
REGISTER
B7
B6
64
B5
32
B4
16
B3
B2
B1
B0
DEFAULT
Critical/Thermal
Shutdown
Temperature
128
8
4
2
1
7Fh
(+127°C)
0Ah
R
The Critical/Thermal Shutdown Temperature Register is a read-only register that stores the Voltage
Programmable Threshold temperature used in the Thermal / Critical Shutdown circuitry. The contents
of the register reflect the calculated temperature determined by the voltage on the TRIP_SET pin (see
Section 5.1.2).
The data format is shown in Table 6.5.
Table 6.5 Critical / Thermal Shutdown Data Format
TEMPERATURE (°C)
BINARY
HEX
0
1
0000_0000b
0000_0001b
0011_1111b
0100_0000b
0100_0001b
0111_1111b
00h
01h
3Fh
40h
41h
7Fh
63
64
65
127
6.4
Pushed Temperature Registers
Table 6.6 Pushed Temperature Register
ADDR
R/W
REGISTER
B7
B6
64
64
B5
32
32
B4
16
16
B3
B2
B1
B0
DEFAULT
0Ch
R/W
Pushed
Temperature 1
Sign
8
4
2
1
00h
0Dh
R/W
Pushed
Temperature 2
Sign
8
4
2
1
00h
SMSC EMC2103
Revision 0.85 (01-29-08)
DATA4S3HEET
SMSC [ SMSC CORPORATION ]
