TSL26711FN datasheet(18/45 Pages) OSRAM

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ams Datasheet

Page 17

[v1-00] 2016-Jul-12

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TSL2671 − Principles of Operation

Interrupts

The interrupt feature simplifies and improves system efficiency

by eliminating the need to poll the sensor for a proximity value.

The interrupt mode is determined by the state of the PIEN field

in the ENABLE register.

Two 16-bit-wide interrupt threshold registers allow the user to

define upper and lower threshold limits. An interrupt can be

generated when the proximity data (PDATA) exceeds the upper

threshold value (PIHTx) or falls below the lower threshold

(PILTx).

To further control when an interrupt occurs, the device provides

an interrupt persistence feature. This feature allows the user to

specify a number of conversion cycles for which an event

exceeding the proximity interrupt threshold must persist

(PPERS) before actually generating an interrupt. See the register

descriptions for details on the length of the persistence.

Figure 20:

Programmable Interrupt

Prox

ADC

Prox

Data

Prox

Integration

CH0

Upper Limit

Lower Limit

Prox Persistence

PILTH(r0x09), PILTL(r0x08)

PIHTH(r0x0B), PIHTL(r0x0A)

PPERS(r0x0C, b7:4)

CH1

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