EMC2113 datasheet(45/88 Pages) MICROCHIP

45 / 88 page

RPM-Based Fan Controller with Multiple Temperature Zones & Hardware Thermal Shutdown

Datasheet

 2013 Microchip Technology Inc.

DS20005251A-page 45

7.3

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 6.1.2, "SHDN_SEL Pin").

The data format is shown in Table 7.5, "Critical/Thermal Shutdown Data Format".

7.4

Pushed Temperature Registers

0100_0001_000b

41_00h

127

0111_1111_000b

7F_00h

127.875

0111_1111_111b

7F_E0h

Table 7.4 Critical/Thermal Shutdown Temperature Register

ADDR

R/W

DEFAULT

0Ah

Critical/Thermal

Shutdown

Temperature

128

7Fh

(+127°C)

Table 7.5 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 7.6 Pushed Temperature Registers

ADDR

R/W

DEFAULT

0Ch

R/W

Pushed / Polled

Temperature 1

Sign

00h

0Dh

R/W

Pushed / Polled

Temperature 2

Sign

00h

Table 7.3 Temperature Data Format (continued)

TEMPERATURE (°C)

BINARY

HEX (AS READ BY

REGISTERS)

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