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Single-Chip Voice Recording & Playback Device for Multiple 40- to 60-Second Messages

Figure 4 shows the device configured in tape mode, using the

auto rewind option. Auto rewind is convenient for systems

designed to store multiple messages. Auto rewind option

does slightly increase parts count above that required for nor-

mal option The Busy pin, /Strobe, and /M7_END are again

connected to LEDs to offer indication to the user of device

status.

Figure 4 Tape Mode, Auto Rewind Option

/M 1_M essage

/M 2_N ext

/M 3

/M 5

/M 4

/M 6

OscR

/M 7_E N D

/M 8_O ption

/B usy

BE

VSSD

VSSA

SP+

APR9600

V CCD

/R E

ExtC lk

M SEL2

M SEL1

/C E

/S trobe

A na_O ut

A na_In

AG C

MicR ef

MicIn

V CCA

SP-

28

27

26

25

24

23

22

21

20

19

18

17

16

15

1

2

3

4

5

6

7

8

9

10

11

12

13

14

Busy Indicator LED

Vcc

100 k

End Indicator LED

100 k

38 k

Flashing record / play Indicator LED

100 k

220 k

4.7µF

0.1µF

0.1µF

0.1µF

Vcc

0.1µF

22µF

Vcc

100 k

Rewind switch

Slide action record / playback sw itch

Play / Record Trigger

Electret

Microphone

4.7k

4.7k

+

_

Skip to next message switch

22µF

1k

APR9600

APLUS