Z8FS021 datasheet(51/68 Pages) ZILOG

부품명	Z8FS021

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PS028806-0315

Advanced API Register Set

ZMOTION® Intrusion Detection

Product Specification

Table 26 summarizes the maximum Noise Sensitivity values for each window size.

Table 26. Maximum Noise Sensitivity Values

Window Size

Max PIR Noise Sensitivity

Value

Typical Value

Small

0Ch

08h

Medium

1Dh

12h

Large

46h

Table 27. PIR Signal

(ePIR_Signal)

Bit

9876543210

Field

PIR Signal

Control

Read

Address

FAH

FBH

PIR Signal (Bits 15–0)

Controlled by the PIR Engine.

• These registers contain the last PIR signal obtained by the Engine. Each time the Engine generates

a new PIR signal sample it will place it in these registers and set the New Sample bit in the PIR

Advanced Status/Control 0 Register. This gives the application direct visibility to the PIR generated

signal for debugging purposes.

• Note: The 16 bit value provided by these two 8 bit registers must be read as an atomic operation by

the application. This can be ensured by either using the CPU's ATM instruction or by disabling

interrupts while reading the two 8 bit registers.

Z8FS021 데이터시트(PDF) 51 Page - Zilog, Inc.