Z8FS040 datasheet(47/56 Pages) ZILOG

47 / 56 page

ZMOTION

TM Detection and Control Family

Product Specification

PS028506-1110

PRELIMINARY

Z8FS040xHH20EG - (20 Pin)

Single Pyroelectric Sensor

Figure 11 shows an example circuit for the 20 pin device of the ZMOTION

TM Detection and

Control MCU Family with a single Pyro Electric sensor. The interface to the pyroelectric sensor

is via the dedicated input ANA2 (pin 2). VREF (pin 18) must be externally tied to ANA3 (pin 3).

The status LED is driven by pin 19 (PC3/COUT) which is normally configured as a GPIO by

the application to control the state of the LED. This pin provides a programmable constant

current sink specifically for LED drive without using an external resistor. Pin 15 is dedicated as

the Debug pin and is connected to pin 4 of the Debug Header. Pin 14 is set up for the Reset

function, but may also be used as PD0 (general purpose I/O) as the application requires. Pull-

up resistors (10K) are provided on the Debug and Reset signals as required for the Debug

interface. All other signals may be used as needed. The power supply design is left to the

application needs.

10K

VDD (3.3V)

VCC

RESET

GND

DBG

GND

Debug Header

Z8FS040xHH020EG

VDD

PB1/ANA1

ANA2

ANA3

PA0/T0IN/T0OUT/XIN

VSS

PA1/T0OUT/XOUT

PA2/DE0

PA4/RXD0

PA3/CTS0

PB0/ANA0

PC3/COUT

PC2/ANA6/LED/VREF

PC1/ANA5/CINN

PC0/ANA4/CINP

DBG

PA7/T1OUT

PA5/TXD0

RESET/PD0

PA6/T1IN/T1OUT

10K

VDD (3.3V)

1uF

47K

Pyro Electric

Sensor

VDD

GND

SIG

VDD (3.3V)

Status LED

VDD (3.3V)

Figure 11 - Required Circuit Connections of Z8FS040xHH20EG

(20 Pin) Motion Detection MCU – Single Pyro Mode

Z8FS040 Datasheet(PDF) 47 Page - Zilog, Inc.

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