Z8FS021 Datasheet, PDF (49/68 Pages) Zilog, Inc. – Select from an assortment of lenses and pyroelectric sensors to best fit your application

ZMOTION^® Intrusion Detection
Product Specification
41
Table 22. PIR Debounce Timeout Register
(ePIR_Debounce)
Bit
7
6
5
4
3
2
1
0
Field
PIR Debounce Time
Control
Read/Write
Address
F6H
PIR Debounce Time (Bits 7–0)
Controlled by the application.
• This register controls the amount of time that the Engine will wait to fully debounce a motion signal.
Longer times result in detection of subtle motion at the cost of more potential false motion detections.
Valid range is from 01h to FFh.
• Using a value less than the value in the PIR Sensitivity Register will result in no motion detection.
Table 23. PIR Debounce Batch Size Register
(ePIR_Debounce_Batch)
Bit
7
6
5
4
3
2
1
0
Field
PIR Debounce Batch Size
Control
Read/Write
Address
F7H
PIR Debounce Batch Size (Bits 7–0)
Controlled by the application.
• This register determines the number of consecutive out-of-window samples required in order to
consider the sequence a valid debounce count. The field works as a mask. Increasing the mask size
(i.e. more bits set to 1) will increase the noise immunity of the Engine but result in lower sensitivity to
subtle motion signals.
• Valid values are 01h, 03h, 07h, 0Fh, 1Fh, 3Fh, 7Fh and FFh.
PS028806-0315
Advanced API Register Set