Z8FS021 datasheet(30/68 Pages) ZILOG

No. de pieza	Z8FS021

Descripción Electrónicos	Select from an assortment of lenses and pyroelectric sensors to best fit your application

PDF	68 Pages

Scroll/Zoom	100%

Fabricante Electrónico	ZILOG [Zilog, Inc.]

Página de inicio	http://www.zilog.com

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30 / 68 page

PS028806-0315

PIR Engine and API

ZMOTION® Intrusion Detection

Product Specification

CPU Cycles: 261

Peripherals initialized: ADC and GPIO, depending on API-selected options. The ADC

IRQ is set for medium priority.

EPIR_ADC_ISR Macro.

This macro is executed for each ADC conversion. The applica-

tion handles the ADC interrupt and executes this macro. All motion detection processing

is performed by this macro.

EPIR_ADC_ISR Macro:

PUSHX

LDX

RP, #%E0

CALL

%1000

POPX

The CPU cycles used by the EPIR_ADC_ISR macro vary depending on Engine state and

configuration.

PIR Engine CPU Stack Usage

The PIR Engine shares the processor stack with the user application. There are no special

requirements on the placement of the stack in memory, but it is essential that the user pro-

vide enough stack space for both the user application and the PIR Engine.

The PIR Engine requires a maximum 6 bytes of stack.

Z8FS021 Datasheet(PDF) 30 Page - Zilog, Inc.