EMC1187 datasheet(32/47 Pages) MICROCHIP

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

Datasheet

Revision 1.0 (07-11-13)

SMSC EMC1187

DATASHEET

The device contains both high and low limits for all temperature channels. If the measured temperature

exceeds the high limit, then the corresponding status bit is set and the ALERT pin is asserted.

Likewise, if the measured temperature is less than or equal to the low limit, the corresponding status

bit is set and the ALERT pin is asserted.

The data format for the limits must match the selected data format for the temperature so that if the

extended temperature range is used, the limits must be programmed in the extended data format.

The limit registers with multiple addresses are fully accessible at either address.

6.7

Scratchpad Registers 11h and 12h

The Scratchpad Registers are Read / Write registers that are used for place holders to be software

compatible with legacy programs. Reading from the registers will return what is written to them.

18h

R/W

External

Diode 2 Low

Limit Low

Byte

0.5

0.25

0.125

00h

2Ch

R/W

External

Diode 3 High

Limit High

Byte

128

6432

55h

(85°C)

2Dh

R/W

External

Diode 3 Low

Limit High

Byte

128

6432

00h

(0°C)

2Eh

R/W

External

Diode 3 High

Limit Low

Byte

0.5

0.25

0.125

00h

2Fh

R/W

External

Diode 3 Low

Limit Low

Byte

0.5

0.25

0.125

00h

Table 6.8 Scratchpad Register

ADDR

R/W

DEFAULT

11h

R/W

Scratchpad

00h

12h

R/W

Scratchpad

00h

Table 6.7 Temperature Limit Registers (continued)

ADDR.

R/W

DEFAULT

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