Datasheet

PRELIMINARY ISD1700 SERIES
Publication Release Date: Nov 6, 2008
- 18 - Revision 1.31
Example #3: Connecting the SPI Interface to a microcontroller
ISD1700
R
OSC
ERASE
PLAY
REC
AGC
AnaIn
MIC -
MIC+
MISO
MOSI
SCLK
SS
FWD
VOL
24
23
25
26
19
10
11
20
18
22
9
7
6
5
4
*** At 8kHz sampling freq, Rosc = 80 K
Rosc ***
4.7 F
μ
FT
0.1 F
μ
To uC
SPI
: Digital ground; : Analog ground; : Ground for SP+; : Ground for SP-
Vcc Gnd
V
CCA
SP+
AUD/AUX
V
SSD
V
CCD
V
CCA
0.1 F
μ
LED
1 KΩ
V
CCD
*
D1
2
1
28
17
V
CCA
V
CCD
V
CCP
V
SSA
V
CCP
V
SSP1
SP-
V
SSP2
V
CCP
0.1 F
μ
0.1 F
μ
*
*
21
8
14
16
12
0.1 F
μ
*
INT/RDY
27
**
**
15
13
Speaker
or Buzzer
V
CCD
Optional
Ω100 K
vAlert
Optional: based upon the applications
390
Ω
0.1 F
μ
V
CC
8050C
Speaker
AUX
AUD
3
RESET
0.1 F
μ
Reset
10.1
20
GOOD AUDIO DESIGN PRACTICES
y decoupling. See recommendations from below links or other
pplication Notes in our websites.
AN-CC1002 Design Considerations for ISD1700 Family.pdf
G
http://www.Nuvoton-usa.com/products/isd_products/chipcorder/applicationinfo/apin11.pdf
To ensure the highest quality of voice reproduction, it is important to follow good audio design
practices in layout and power suppl
A
Design Considerations for ISD1700 Family
ood Audio Design Practices
S
http://www.Nuvoton-usa.com/products/isd_products/chipcorder/applicationinfo/apin12.pdf
ingle-Chip Board Layout Diagrams