ADT7312

Data Sheet

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ONE-SHOT MODE

When one-shot mode is enabled, the ADT7312 immediately

completes a conversion and then goes into shutdown mode.

The one-shot mode is useful when one of the circuit design

priorities is to reduce power consumption.

To enable one-shot mode, set Bits[6:5] of the configuration reg-

ister (Register Address 0x01) to 01. After writing to the operation

mode bits (Bits[6:5]), wait at least 240 ms before reading back the

temperature from the temperature value register (see Figure 11).

This delay ensures that the ADT7312 has adequate time to power

up and complete a conversion.

To obtain an updated temperature conversion, reset Bits[6:5]

of the configuration register to 01.

CT and INT Operation in One-Shot Mode

Figure 12 illustrates the operation of the CT pin in one-shot

that in interrupt mode, a read from any register resets the CT

and INT pins. (For more information about interrupt mode and

comparator mode, see the Undertemperature and Overtemperature

Detection section.)

If the INT pin is configured for comparator mode and the

configuration register (Register Address 0x01, Bits[6:5] = 01)

resets the INT pin.

If the CT pin is configured for comparator mode and the

operation mode bits of the configuration register (Register

Address 0x01, Bits[6:5] = 01) resets the CT pin (see Figure 12).

When using one-shot mode, ensure that the refresh rate is

appropriate to the application being used.

DIN

0x08

0x20

DATA

SCLK

DOUT

CS

WAIT 240ms MINIMUM

FOR CONVERSION TO FINISH

Figure 11. Typical SPI One-Shot Write to Configuration Register Followed by a Read from the Temperature Value Register

Rev. A