EMC2103 datasheet(43/84 Pages) SMSC

43 / 84 page

RPM-Based Fan Controller with HW Thermal Shutdown

Datasheet

SMSC EMC2103

Revision 0.85 (01-29-08)

DATASHEET

6.3

Critical/Thermal Shutdown Temperature Register

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.

6.4

Pushed Temperature Registers

0100_0001_000b

41_00h

127

0111_1111_000b

7F_00h

127.875

0111_1111_111b

7F_E0h

Table 6.4 Critical/Thermal Shutdown Temperature Register

ADDR

R/W

DEFAULT

0Ah

Critical/Thermal

Shutdown

Temperature

128

7Fh

(+127°C)

Table 6.5 Critical / Thermal Shutdown Data Format

TEMPERATURE (°C)

BINARY

HEX

0000_0000b

00h

0000_0001b

01h

0011_1111b

3Fh

0100_0000b

40h

0100_0001b

41h

127

0111_1111b

7Fh

Table 6.6 Pushed Temperature Register

ADDR

R/W

DEFAULT

0Ch

R/W

Pushed

Temperature 1

Sign

842100h

0Dh

R/W

Pushed

Temperature 2

Sign

842100h

Table 6.3 Temperature Data Format (continued)

TEMPERATURE (°C)

BINARY

HEX (AS READ BY

REGISTERS)

EMC2103 Datasheet(PDF) 43 Page - SMSC Corporation

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