Z8FS021 Datasheet, PDF(25/68 Page) Zilog, Inc. – Select from an assortment of lenses and pyroelectric sensors to best fit your application

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Z8FS021 Datasheet, PDF (25/68 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

Interrupt Controller

No changes or limitations are placed on the interrupt controller functions by the PIR

Engine.

Temperature Sensor

The temperature sensor is not tested or calibrated (trim bits are not available). Therefore,

this peripheral is not available on any of the Z8FS040 devices.

Low-Power Operational Amplifier

The AMPINP signal is multiplexed with ANA2 which is used for the pyro sensor input.

Therefore, this peripheral is not available on any of the Z8FS040 devices.

Non-Volatile Data Storage

There is no dedicated non-volatile data storage on the Z8FS040 devices.

Pin Availability

Although most pins on the ZMOTION MCU Series are available to the application, some

pins are dedicated to supporting the functions of the PIR Engine. This section describes

which pins are reserved and which are available to the application. The pins used by the

PIR Engine are automatically configured when the Engine is initialized.

General-Purpose Input/Output

All of the General Purpose I/Os are available except for those used for the PIR circuit. See

Appendix A. Example Application Schematics on page 49 for more information.

8-Pin Device

20-Pin Device

Pin 5 (ANA2) is reserved as the analog ADC input from the pyroelectric sensor. Any other

functions multiplexed with Pin 5 (PA3//CTS0, COUT and T1IN) are not available for user

applications.

In Dual Pyro Mode, in which the application uses 2 pyroelectric sensors, Pin 3 (ANA3) is

used as an analog ADC input for a second sensor and is therefore not available for other

functions (T0OUT/VREF/CLKIN).

Pin 2 (ANA2) is reserved as the analog ADC input from the pyroelectric sensor. In Single

Pyro Mode, Pin 3 (ANA3) must be externally tied to VREF on Pin 18 (PC2/ANA6/LED/

VREF). PC2 will be configured as the VREF output by the PIR Engine when it is enabled.

In Dual Pyro Mode (supporting 2 pyroelectric sensors), Pin 3 (ANA3) is used for the

second sensor. In this mode the Pin 18 VREF signal is not connected externally to any

other ADC inputs and is therefore available to the application (PC2/ANA6/LED/VREF).

PS028806-0315

Peripherals

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