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AS6221T

Register Description

Datasheet

• PUBLIC

DS001032

• v1-00 • 2022-Apr-08

37

│ 16

The serial interface is the only active circuitry in the sleep mode in order to provide access to the

digital registers.

Entering the sleep mode will take some time (120 ms maximum) and the first conversion after the

sleep mode has been entered takes longer than the values specified in Figure 6. It is therefore

recommended when entering sleep mode to trigger a single shot conversion at the same time. After

150 ms (max), the device has then entered the sleep mode and subsequent conversion times are as

specified in Figure 6.

After resetting the SM bit to 0, the device enters the continuous conversion mode.

Figure 18:

Sleep Mode Configuration

Sleep Mode Bit

Operation Mode

0

Continuous Conversion Mode

1

Sleep Mode

6.2.5

Interrupt Mode

The interrupt mode bit defines whether the device operates in the temperature comparator mode or

the interrupt mode. This defines the operation of the ALERT output as described in the polarity section

bit.

Figure 19:

Interrupt Mode Configuration

Interrupt Mode Bit

Configuration Mode

0

Comparator Mode

1

Interrupt Mode

The comparator mode is characterized that if the temperature value exceeds the THIGH value, the

alert output is changed (e.g. from high to low if the polarity bit is set to 0 and vice versa). The alert

output stays in that condition until the measured temperature drops below the defined TLOW value.

The interrupt mode is characterized that it changes the alert output as soon as the measured

temperature crosses the THIGH or TLOW value threshold.

The alert bit has the same setting as the alert output if the device is set to comparator mode.