AS621X datasheet(19/37 Pages) OSRAM

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AS621x

Datasheet

• PUBLIC

DS000677

• v4-00 • 2022-May-17

│ 18

6.2.9

High and Low Limit Registers

If the comparator mode is configured (IM=0), the ALERT output becomes active if the temperature

equals or exceeds the defined value in register THIGH for the configured number of consecutive

faults (N). This configuration is defined by the field CF in the configuration register. The ALERT output

remains assigned until the converted temperature value equals or falls below the defined value in

If the interrupt mode is configured (IM=1), the ALERT output becomes active if the temperature equals

or exceeds the defined value in register THIGH for the configured number of consecutive fault cycles.

It remains active until a read operation is executed on any register. The ALERT output is also cleared

if the device is set into sleep mode by setting bit SM in the configuration register.

Once the ALERT output is cleared, it is activated again only if the temperature value falls below the

configured value in register TLOW. It remains active unless a read operation has taken place.

This sequence is repeated unless the device is set into the comparator mode. This reset command

clears the interrupt mode bit and consequently puts the device into the comparator mode.

The sequential behavior is summarized in the following Figure 23.

AS621X Fiches technique(PDF) 19 Page - OSRAM GmbH