ADT7320

Data Sheet

Rev. 0 | Page 14 of 24

CONFIGURATION REGISTER

This 8-bit read/write register (Register Address 0x01) stores various

configuration modes for the ADT7320, including shutdown,

overtemperature and undertemperature interrupts, one-shot,

continuous conversion, interrupt pin polarity, and

overtemperature fault queues.

Table 8. Configuration Register (Register Address 0x01)

Bit(s)

Default

Value

Type

Name

Description

[1:0]

00

R/W

Fault queue

These two bits set the number of undertemperature/overtemperature faults that can

occur before setting the INT and CT pins. This helps to avoid false triggering due to

temperature noise.

00 = 1 fault (default).

01 = 2 faults.

10 = 3 faults.

11 = 4 faults.

[2]

0

R/W

CT pin polarity

This bit selects the output polarity of the CT pin.

0 = active low.

1 = active high.

[3]

0

R/W

INT pin polarity

This bit selects the output polarity of the INT pin.

0 = active low.

1 = active high.

[4]

0

R/W

INT/CT mode

This bit selects comparator mode or interrupt mode.

0 = interrupt mode.

1 = comparator mode.

[6:5]

00

R/W

Operation mode

These two bits set the operational mode of the ADT7320.

00 = continuous conversion (default). When one conversion is finished, the ADT7320

begins the next conversion.

01 = one-shot mode. Conversion time is typically 240 ms.

10 = 1 SPS mode. Conversion time is typically 60 ms. This operational mode reduces the

average current consumption.

11 = shutdown. All circuitry except for the interface circuitry is powered down.

[7]

0

R/W

Resolution

This bit sets the resolution of the ADC when converting.

0 = 13-bit resolution. Sign bit + 12 bits gives a temperature resolution of 0.0625°C.

1 = 16-bit resolution. Sign bit + 15 bits gives a temperature resolution of 0.0078°C.