Rainbow Electronics aP89085 - Manual (Page 21)

Integrated Circuits Inc. aP89341/170/085
Ver 2.1 20 Aug 24, 2006
CPU Serial Command Mode
Fig. 25 5V CPU Control with TDA Power Amplifier
VDD, AVDD,VPP
VSS, AVSS
RST
OUT1
OUT3
OSC
0.01uF
10uF
R OSC
COUT 8Ω
Speaker
HT7335
S1 (CS)
S2 (SCK)
S3 (DI)
VOUT=+3.5V
CS
SCK
DI
BUSY
FULL
VIN=+5V
Rin
2
7
0.1u
0.1u
4.7Ω
4.7Ω
10u
0.01uF
8
6
10uF
10KΩ
33Ω
5
4
Gnd
Vcc
+
+
-
-
1
3
T
D
A
2
8
2
2
M
M
C
U
Rin = 860KΩ x (VIN-VOUT) / VIN