Z8FS021 Datasheet, PDF(60/68 Page) Zilog, Inc. – Select from an assortment of lenses and pyroelectric sensors to best fit your application

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Z8FS021 Datasheet, PDF (60/68 Pages) Zilog, Inc. – Select from an assortment of lenses and pyroelectric sensors to best fit your application

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ZMOTIONÂ® Intrusion Detection

Product Specification

Dual Pyroelectric Sensors

In Dual Pyro mode, the second pyroelectric sensor is connected to ANA3. The signal from

VREF to ANA3 is not required. In this design example, the internal VREF is used with

PIR_ASC0 bit 7 set to '0'. The user could choose to use an externally generated VREF

source in which case it would be connected to pin 18 and PIR_ASC0 bit 7 would be set to

'1'. All other connections remain the same as Single Pyro Mode. See Figure 9.

VDD (3.3V)

1uF

VDD (3.3V)

1uF

Pyro Electric

Sensor 1

VDD

SIG

GND

47 K

VDD (3.3V)

1uF

Pyro Electric

Sensor 2

VDD

SIG

47 K

GND

470

Status LED &

White Light

Detection

1 PB1/ANA1

PB0/ANA0 20

2 ANA2

PC3 /COUT 19

3 ANA3

PC2/ANA6/LED /VREF 18

4 VDD

PC1/ANA5/CINN 17

5 PA0/T0IN /T0 OUT/XIN PC0 /ANA4 /CINP 16

6 PA 1/T0OUT/XOUT

DBG 15

7 VSS

R ESET/PD0

8 PA2/D E0

PA7/T1 OUT 13

9 PA 3/CTS0

PA6/T1IN/T1 OUT 12

10 PA4/RXD0

PA5 /TXD0 11

Z8FS021xHH20EG

VD D(3.3V)

10K

Debug Header

1 VCC

2 RESET

3 GND

4 DBG

5 GND

6 NC

Figure 9. Example Circuit with the Z8FS021xHH20EG (20-Pin) ZMOTION Intrusion Detection MCU,

Dual Pyro Mode

PS028806-0315

Appendix A. Example Application Schematics

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