TSL2591 datasheet(14/25 Pages) AMSCO

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TSL2591 – 14

Datasheet - Apr. 2013 - ams163.5

The ALS interrupt threshold registers provide the values to be

used as the high and low trigger points for the comparison

function for interrupt generation. If C0DATA crosses below the

low threshold specified, or above the higher threshold, an

interrupt is asserted on the interrupt pin.

If the C0DATA exceeds the persist thresholds (registers: 0x04 –

0x07) for the number of persist cycles configured in the PERSIST

the no-persist thresholds (registers: 0x08 – 0x0B) an interrupt

will be triggered immediately following the end of the current

integration.

Note that while the interrupt is observable in the STATUS

NPIEN are enabled in the ENABLE register (0x00).

Upon power up, the interrupt threshold registers default to

0x00.

Address

Bits

Description

AILTL

0x04

7:0

ALS low threshold lower byte

AILTH

0x05

7:0

ALS low threshold upper byte

AIHTL

0x06

7:0

ALS high threshold lower byte

AIHTH

0x07

7:0

ALS high threshold upper byte

NPAILTL

0x08

7:0

No Persist ALS low threshold lower byte

NPAILTH

0x09

7:0

No Persist ALS low threshold upper byte

NPAIHTL

0x0A

7:0

No Persist ALS high threshold lower byte

NPAIHTH

0x0B

7:0

No Persist ALS high threshold upper byte

ALS Interrupt Threshold Register

(0x04 − 0x0B)

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