RPM-Based Fan Controller with Multiple Temperature Zones & Hardware Thermal Shutdown
Datasheet
Table 7.3 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
7.3
Critical/Thermal Shutdown Temperature Register
Table 7.4 Critical/Thermal Shutdown Temperature Register
ADDR
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
Critical/Thermal
Shutdown
Temperature
7Fh
(+127°C)
0Ah
R
128
64
32
16
8
4
2
1
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 6.1.2, "SHDN_SEL Pin").
The data format is shown in Table 7.5, "Critical/Thermal Shutdown Data Format".
Table 7.5 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
7.4
Pushed Temperature Registers
Table 7.6 Pushed Temperature Registers
ADDR
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
Pushed / Polled
Temperature 1
0Ch
R/W
Sign
64
32
16
8
4
2
1
00h
Pushed / Polled
Temperature 2
0Dh
R/W
Sign
64
32
16
8
4
2
1
00h
SMSC EMC2113
Revision 1.2 (10-08-09)
DATA4S5HEET
SMSC [ SMSC CORPORATION ]
