1°C Dual SMBus Sensor with Resistance Error Correction

Datasheet

Revision 1.3 (03-24-06)

14

SMSC EMC1002

DATASHEET

interlock mechanism requires that the high byte register always be read prior to reading the low byte

register.

4.9

Status Register

The status register is a read only register that stores the operational status of the part.

Bit 7 indicates that the ADC is busy converting a value. Bits 6 and 5 indicate that the internal

temperature is above or below its high or low limits respectively. Likewise, bits 4 and 3 indicate that

remote temperature is above or below its limits. See 4.12, "Limit Registers," on page 15 for detail on

the limits are compared. Bit 2 indicates that an open circuit on the remote diode anode connection has

been detected. Bits 1 and 0 indicate that the remote temperature or the internal temperature has

When the status register is read, bits 2 through 6 will individually clear provided that the error condition

reset if the status register has not been cleared.

4.10

Configuration Register

The configuration register controls the functionality of the temperature measurements.

Table 4.4 Status Register

STATUS REGISTER

BIT

NAME

FUNCTION

7

Busy

1 when ADC is converting

6

LHIGH

1 when Internal Temperature High Limit is exceeded

5

LLOW

1 when Internal Temperature Low Limit is exceeded

4

R1HIGH

1 when Remote Temperature High Limit is exceeded

3

R1LOW

1 when Remote Temperature Low Limit is exceeded

2

FAULT

1 when Remote is open circuit

1

R1THRM

1 when Remote THERM Limit is exceeded

0

LTHRM

1 when Internal THERM Limit is exceeded

Table 4.5 Configuration Register

CONFIGURATION REGISTER

BIT

NAME

FUNCTION

DEFAULT

7

MASK1

0

6

RUN/STOP

0 = Active mode (continuously running)

1 = Standby mode

0

5

ALERT

0