EMC1413 datasheet(34/52 Pages) SMSC

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Multiple Channel 1°C Temperature Sensors with Beta Compensation

Datasheet

Revision 1.41 (02-23-12)

SMSC EMC1413 / EMC1414

DATASHEET

7.7

Scratchpad Registers

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.

7.8

One Shot Register

The One Shot Register is used to initiate a one shot command. Writing to the one shot register when

the device is in standby mode and BUSY bit (in Status Register) is ‘0’, will immediately cause the ADC

to update all temperature measurements. Writing to the One Shot Register while the device is in active

mode will have no effect.

7.9

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 THERM pin is asserted. The limit setting must

match the chosen data format of the temperature reading registers.

Table 7.8 Scratchpad Register

ADDR

R/W

DEFAULT

11h

R/W

Scratchpad

00h

12h

R/W

Scratchpad

00h

Table 7.9 One Shot Register

ADDR.

R/W

DEFAULT

0Fh

One Shot

Writing to this register initiates a single conversion cycle. Data

is not stored and always reads 00h

00h

Table 7.10 Therm Limit Registers

ADDR.

R/W

DEFAULT

19h

R/W

External

Diode 1

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)

30h

R/W

External

Diode 3

Therm Limit

128

55h

(85°C)

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