1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

Datasheet

SMSC EMC1053

19

Revision 1.44 (04-14-08)

DATASHEET

4.3

Status Register - 02h

The Status Register is a read only register and returns the operational status of the part. External diode

faults are indicated by bits 1 and 0. If either bit is set to ‘1’, then a diode fault has occurred. When a

diode fault occurs, the D1 or D2 status bit is set, but otherwise the data remains unchanged.

Bit 7 - Busy - indicates that the ADC is currently converting a temperature.

Bit 4 - HOTTER - during Hotter of Two mode, this bit indicates which of the external diode channels

is hotter. If this bit is ‘0’, then External Diode 1 is hotter or equal to External Diode 2. If this bit is ‘1’,

then External Diode 2 is hotter than External Diode 1. During normal operation, this bit will always read

a ‘0’.

Bit 1 - D2 - indicates that a diode fault has occurred on External Diode 2.

Bit 0 - D1 - indicates that a diode fault has occurred on External Diode 1.

4.4

Configuration Register (03h Read, 09h Write)

The Configuration Register controls the basic functionality of the EMC1053. The bits are described

below:

Bit 6 - STANDBY- controls the ADC conversions and power modes of the part.

'0' - The device is in the run operating mode. The ADC is converting at the user-programmed

conversion rate.

'1' - (default) The device is in the standby operating mode (see Section 3.1).

Bit 2-0 - CR<2:0> - determines the conversion rate for the temperature monitoring per Table 4.4.

Table 4.2 Status Register

ADDR

REGISTER

B7

B6

B5

B4

B3

B2

B1

B0

DEFAULT

02h

Status

Busy

-

-

HOTTER

-

-

D2

D1

00h

Table 4.3 Configuration Register

ADDR

REGISTER

B7

B6

B5

B4

B3

B2

B1

B0

DEFAULT

03h Read,

09h Write

Config

-

STANDBY

-

-

-

CR<2:0>

45h