Preliminary Technical Data

ADT7320

Rev. PrA | Page 15 of 24

CONFIGURATION REGISTER

This 8-bit read/write register stores various configuration modes

for the ADT7320, including shutdown, overtemperature and

undertemperature interrupts, one-shot, continuous conversion,

interrupt pins polarity, and overtemperature fault queues.

Table 8. Configuration Register (Register Address 0x01)

Bit

Default

Value

Type

Name

Description

[0:1]

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 between comparator mode and interrupt mode.

0 = interrupt mode.

1 = comparator mode.

[5:6]

00

R/W

Operation mode

These two bits set the operational mode for the ADT7320.

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

starts another.

01 = one shot. 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 interface circuitry is powered down.

[7]

0

R/W

Resolution

This bit sets up 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 0.0078125°C.