Z8FS040 datasheet(35/56 Pages) ZILOG

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ZMOTION

TM Detection and Control Family

Product Specification

PS028506-1110

PRELIMINARY

MD Origin (Bit 2)

Origin of last motion detection event

Controlled by PIR engine

This bit indicates how the PIR engine detected the last Motion Detected Event. When the engine sets

the Motion Detected bit in PIRStatus0, it also sets this bit according to which detection engine registered

the event.

0 – Normal Motion Detector

1 – Extended Motion Detector

EM Noise Detected (Bit 1)

EM Noise Detected on PIR Signal

Set by PIR engine; cleared by application

This bit indicates if the engine has detected noise on the PIR signal. This event is provided to the user

application to indicate that an EM noise event has occurred and associated motion event(s) may have

been suppressed by the engine. This bit does not have to be read for normal operation and is provided

as status only. The application must clear this bit after it has been read.

EM Transient Detected (Bit 0)

EM Transient Detected on PIR Signal

Set by PIR engine; cleared by application

This bit indicates if the Engine has detected a transient on the PIR signal. This event is provided to the

user application to indicate that an EM transient event has occurred and associated motion event(s)

may have been suppressed by the engine. This bit does not have to be read for normal operation and is

provided as status only. The application must clear this bit after it has been read.

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