EMC6D103 datasheet(64/89 Pages) SMSC

64 / 89 page

Fan Control Device with High Frequency PWM Support and Hardware Monitoring Features

Datasheet

Revision 0.4 (04-04-05)

SMSC EMC6D103

DATASHEET

8.2.13

Registers 4E-53h: Temperature Limit Registers

Setting the Lock bit has no effect on these registers.

If an external temperature input or the internal temperature sensor either exceeds the value set in the

high limit register or is less than or equal to the value set in the low limit register, the corresponding

bit will be set automatically by the EMC6D103 in the Interrupt Status Register 1 (41h). For example,

if the temperature reading from the Remote1- and Remote1+ inputs exceeds the Remote Diode 1 High

Temp register limit setting, Bit[4] D1 of the Interrupt Status Register 1 will be set. The temperature limits

in these registers are represented as 8 bit, 2’s complement, signed numbers in Celsius, as shown

below in Table 8.22.

Table 8.21 Registers 4E-53h: Temperature Limit Registers

Address

Read/

Write

Bit 7

(MSb)

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

(LSb)

Default

Value

4Eh

R/W

Remote Diode 1 Low Temp

81h

4Fh

R/W

Remote Diode 1 High Temp

7Fh

50h

R/W

Internal Low Temp

81h

51h

R/W

Internal High Temp

7Fh

52h

R/W

Remote Diode 2 Low Temp

81h

53h

R/W

Remote Diode 2 High Temp

7Fh

Table 8.22 Temperature Limits vs. Register Settings

TEMPERATURE

LIMIT (DEC)

LIMIT (HEX)

-127

°c

-127

81h

-50

°c-50

CEh

°c0

00h

°c50

32h

127

°c

127

7Fh

EMC6D103 Datasheet(PDF) 64 Page - SMSC Corporation

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