APR6016 datasheet(15/24 Pages) APLUS

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Preliminary

APR6016 Data Sheet

Voice Recording & Playback Device

Page 15

Revision 1.0

Sample Application

Figure 15 shows a sample application utilizing a generic

microcontroller and SPI interface for message management.

The microcontroller uses three general purpose inputs for the

play, record and skip buttons. Five general purpose I/O sig-

nals are utilized in the SPI interface. The /RESET and /BUSY

signal are not used in this design.

The output signal must be amplified in order to drive a

speaker. Several vendors supply integrated speaker amplifi-

ers that can be used for this purpose.

A microphone amplifier and AGC are recommended. Both

blocks are optional. Several vendors supply integrated micro-

phone/AGC amplifiers that can be used for this purpose.

Note that the AGC circuit can be simplified by using the SQLCAP signal as a

peak detector signal.

Figure 15 Sample Schematic using DIP package

All resistors 2.2 K

/C S

VSSD

AN AO U T-

AN A O U T +

/R ESET

VS SA

A U DO UT

SQ LC AP

SC LK

VC C D

EXT C LK

/IN T

SAC

VSSA

/BU S Y

VC C A

AN AIN +

AN AIN -

/SQL OU T

G eneric

M icrocontroller

I/O_4

I/O_5

I/O _7

I/O _8

I/O _6

0.1 µ F

1 00K

Vc c

/IR Q

I/O_3

I/O_2

I/O _1

Play

Record

Skip

Vcc

1.0 uF

Vcc

Speaker

AG C

Block

S p eak er

A m p lifie r

Vc c

Mic

Pre-Amp

Mic

Vcc

2.2K

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