APR6016 Datasheet, PDF (15/24 Pages) Aplus Intergrated Circuits – Voice Recording & Playback Device 16 Minute Duration

Preliminary
APR6016 Data Sheet
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
Vcc
All resistors 2.2 K
Play
Record
Skip
G e n e ric
M i cro c o n tro lle r
I/O _ 1
I/O_2
I/O_3
I/O_4
I/O_5
I/O _ 6
/IR Q
I/O _ 7
I/O _ 8
/CS 1
DI 2
DO 3
VSSD 4
NC 5
NC 6
NC 7
ANAOUT- 8
ANAOUT+ 9
NC 10
/R ES E T 11
VSSA 12
AUDOUT 13
0.1µF _{SQ LCAP}
14
Vcc
2.2K
2.2K
28 SCLK
27 VCCD
26 EXTCLK
25 /INT
24 SAC
23 VSSA
22 NC
21 /BUSY
20 NC
19 NC
18 VCCA
17 ANAIN+
16 ANAIN-
15 /SQLOUT
Vcc
AGC
Block
Vcc
M ic
Mic
Pre-Amp
Speaker
Vcc
Speaker
Am plifier
100K
1.0 uF
Voice Recording & Playback Device
Revision 1.0
Page 15