AS621X datasheet(14/37 Pages) OSRAM

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AS621x

Datasheet

• PUBLIC

DS000677

• v4-00 • 2022-May-17

│ 13

Addr: 0x1

Bit

Bit Name

Default

Access

Bit Description

Reserved

Single Shot

The configuration register is a 16-bit register which defines the operation modes of the device. Any

read/write operation processes the MSB byte first.

In Figure 13 the configuration register is shown. The bits 0-4 and 13-14 are not to be used and are set

to read only. The explanation of the other bits are detailed in the following sections.

6.2.2

Alert Bit

The alert bit can be used to easily compare the current temperature reading to the thresholds that can

be set in the TLOW and THIGH registers.

If the polarity bit is set to 0, the AL bit is read as 1 until the converted temperature value exceeds the

defined value in the high temperature threshold register THIGH for the number of defined consecutive

faults (bits CF). Such an event causes the AL bit to toggle to 0 and the value is kept until the

converted temperature value falls below the defined value in the low temperature threshold register

TLOW for the number of defined consecutive faults. If this condition is met, the AL bit is reset to 1.

The polarity bit (POL) defines the active state of the alert bit as depicted in the following figure.

The alert bit has the same setting as the alert output as long as the device is configured for the

comparator mode.

Figure 14:

State Diagram of the Alert Bit

AS621X Arkusz danych(PDF) 14 Page - OSRAM GmbH