Z8FS040 Datasheet, PDF (52/56 Pages) Zilog, Inc. – ZMOTION Detection and Control Family Featuring Zilog’s PIR Technology

ZMOTION^TM Detection and Control Family
Product Specification
The following flow diagram shows the general S/W operation for Normal Scan Rate mode.
RESET
Initialize Oscillator & WDT
Set up GPIO’s for application
ePIR
Initialization
Initialize Flash Frequency Register
Enable ADC in PWRCTL0
Initialize API Registers
Recommended settings supplied in
lens/pyro configuration file
PIR Scan Rate = 0
Set ePIR_Enable Register to
ePIR_ENABLE_PATTERN
Execute ePIR_INIT Macro
Set up Timer for 1 Second Interrupt
Enable Global Interrupts
Enter ADC
Interrupt
Execute
ePIR_ADC_ISR
Macro
Exit ADC
Interrupt
ADC
Interrupt
Application
Initialization
Main
Application
Loop
Wait for PIR Sensor Stable
ePIR_SC0:0=1
HALT
(Optional)
Monitor ePIR
API for Events
User
Application
Code
1 Second
Timer Interrupt
Set bit 7 of ePIR_SC1
(Engine Timer Tick)
One
Second
Timer Tick
Return
Figure 15 - Application Flow Diagram - Normal Scan Rate
PS028506-1110
PRELIMINARY
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