EMC1183 datasheet(32/48 Pages) MICROCHIP

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Triple Channel 1°C Temperature Sensor with Beta Compensation and 1.8V SMBus Communications

Datasheet

Revision 1.0 (07-11-13)

SMSC EMC1183

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 / THERM2 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 / THERM2 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.

When the device is in Standby mode, updating the limit registers will have no effect until the next

conversion cycle occurs. This can be initiated via a write to the One Shot Register (see Section 6.8,

"One Shot Register 0Fh") or by clearing the RUN / STOP bit (see Section 6.4, "Configuration Register

03h / 09h").

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.

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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