Z8FS040BSB20EG Zilog, Z8FS040BSB20EG Datasheet - Page 25

• Manufacturer Part Number: Z8FS040BSB20EG
• Description: IC MCU 4KB FLASH IRDA 8SOIC
• Manufacturer: Zilog
• Series: ZMOTION™r

Specifications of Z8FS040BSB20EG

• Applications: Infrared Motion Detection
• Core Processor: eZ8
• Program Memory Type: FLASH (4 kB)
• Controller Series: Z8 Encore! XP®
• Interface: IrDA, UART/USART
• Number Of I /o: 5
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Ram Size: -
• Other names: 269-2512

Address
Address
PIR Engine Enable Register (ePIR_Enable)
PIR Enable/Disable Pattern (Bits 0-7)
Table 6 - PIR Software Enable Patterns
PIR Sensitivity Register (ePIR_Sensitivity)
Sensitivity (Bits 0-7)
PS028506-1110
Control
Control
Default
Field
Field
Pattern
Bit
Bit
00h
11h
PIR Enable/Disable Register
Controlled by Application
The PIR Enable Register controls the overall operation of the PIR engine. As an added level of
protection, there is a specific 8 bit enable value and 8 bit disable value. All other values are reserved.
Reading this register returns the last value written. Once enabled, the PIR engine reads the application
controlled Status/Control Register values and sets the engine controlled values to their default state.
To enable the PIR engine, first write the ePIR_ENABLE_PATTERN to the PIR Enable Register then
execute the EPIR_INIT macro.
PIR Sensitivity Setting
Controlled by Application
The PIR Sensitivity Register is used to adjust the sensitivity of the PIR engine to target motion. Lower
values produce higher sensitivity to motion with 00h being the most sensitive and FFh being the least
sensitive. The user application should load this register with the appropriate value to give the desired
sensitivity.
Notes:


The setting of this register also affects the range of detection. Lower values increase range and
higher values decrease range.
Depending on the lens and pyroelectric sensor used, values above 3Fh may result in very limited
detection.
U
7
7
ePIR_DISABLE_PATTERN
ePIR_ENABLE_PATTERN
Name
U
6
6
U
5
5
PIR Enable/Disable Pattern
PRELIMINARY
Disables all Engine functions, including motion detection.
Used to temporarily or permanently shut down the engine.
Enables the PIR engine. All primary engine functions as
configured in Engine Status/Control Registers are enabled.
Confirmation of enabled status is provided through Engine
Disabled bit in Status/Control Register 0.
U
4
4
Read/Write
Sensitivity
Read/Write
100H
101H
ZMOTION
U
3
3
Description
TM
U
Detection and Control Family
2
2
Product Specification
U
1
1
U
0
0
20