SFH7779 datasheet(27/35 Pages) OSRAM

27 / 35 page

Version 1.2

SFH 7779

2016-04-25

PS INT Modes: Bit <5;4> of interrupt function setting register (0x4Ah)

00 PS_TH is active only:

The INT state is active, if the PS measurement result is equal or higher than the set PS_TH high

threshold.

The INT state is inactive, if the PS measurement result is lower than the set PS_TH high thresh-

old.

PS signal

PS INT active

PS INT inactive

PS_TH

PS signal

PS INT active

PS INT inactive

PS_TH

01 PS_TH & PS_TL (PS high & low threshold) are active as hysteresis:

PS_TH and PS_TL are working as a hysteresis. If the PS measurement signal is higher than the

PS high threshold (PS_TH) the INT state is switched to active. If the PS measurement signal is

lower than the PS low threshold (PS_TL) the INT state is inactive. If once the interrupt signal

becomes active, the INT status is kept active until the measurement result becomes less than

the PS_TL register value.

PS signal

PS INT active

PS INT inactive

PS_TH

PS_TL

PS signal

PS INT active

PS INT inactive

PS_TH

PS_TL

10 PS_TH & PS_TL (PS high & low threshold) are active as outside detection:

In case of “PS outside detection“ mode interrupt signal inactive means that the measurement

result is within the registered threshold level and the interrupt signal active means that the meas-

urement result is out of registered threshold level.

PS signal

PS INT active

PS INT inactive

PS_TH

PS_TL

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