EMC1187 datasheet(33/47 Pages) MICROCHIP

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Triple Channel 1°C Temperature Sensor with Hardware Thermal Shutdown and 1.8V SMBus Communications

Datasheet

SMSC EMC1187

Revision 1.0 (07-11-13)

DATASHEET

6.8

Therm Limit Registers

The Therm Limit Registers are used to determine whether a critical thermal event has occurred. If the

measured temperature exceeds the Therm Limit, the SYS_SHDN pin will be asserted (if the

corresponding measurement channel is linked to the SYS_SHDN pin - see Section 6.10, "Software

Thermal Shutdown Configuration Register 1Dh"). The limit setting must match the chosen data format

of the temperature reading registers.

6.9

External Diode Fault Register 1Bh

The External Diode Fault Register indicates which of the external diodes caused the FAULT bit in the

Status Register to be set. This register is cleared when it is read.

Bit 2 - E2FLT - This bit is set if the External Diode 2 channel reported a diode fault.

Bit 1 - E1FLT - This bit is set if the External Diode 1 channel reported a diode fault.

6.10

Software Thermal Shutdown Configuration Register 1Dh

Table 6.9 Therm Limit Registers

ADDR.

R/W

DEFAULT

19h

R/W

External

Diode Therm

Limit

128

55h

(85°C)

1Ah

R/W

External

Diode 2

Therm Limit

128

55h

(85°C)

20h

R/W

Internal Diode

Therm Limit

128

55h

(85°C)

21h

R/W

Therm

Hysteresis

128

0Ah

(10°C)

Table 6.10 External Diode Fault Register

ADDR.

R/W

DEFAULT

1Bh

R-C

External

Diode Fault

E2FLT

E1FLT

00h

Table 6.11 Software Thermal Shutdown Configuration Register

ADDR.

R/W

DEFAULT

1Dh

R/W

Software

Thermal

Shutdown

Configuration

E2SYS

EXT1SYS

INTSYS

00h

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