Z8FS040 datasheet(20/56 Pages) ZILOG

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ZMOTION

TM Detection and Control Family

Product Specification

PS028506-1110

PRELIMINARY

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 Configurations

Although most pins on the ZMOTION

TM MCU Series are available to the application, some

pins are dedicated to supporting the PIR functions. The following section describes which pins

are reserved and which are available to the application. The pins used by Zilog’s PIR

technology are automatically configured when the engine is initialized.

General-Purpose Input/Output

All of the General Purpose I/O’s are available except for those used for the PIR circuit. See example

application schematics, Appendix A for more information.

8 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 (application uses 2 pyroelectric sensors) Pin 3 (ANA3) is used as an analog

ADC input for second sensor and is therefore not available for other functions

(T0OUT/Vref/CLKIN).

20 Pin Device: 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).

28 Pin Device: Pin 1 (ANA2) is reserved as the analog ADC input from the pyroelectric

sensor. In single pyro mode, Pin 4 (ANA3) must be externally tied to VREF on Pin 3 (PB5/ VREF).

PB5 will be configured as VREF output by the PIR engine when it is enabled.

In dual pyro mode (supporting 2 pyroelectric sensors), Pin 4 (ANA3) is used for second

sensor. In this mode the Pin 3 VREF signal is not connected externally to any other ADC inputs

and is therefore available to the application (PB5/ VREF).

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