SNC745
16-bit Voice Processor
VDD (4.5V)
U1
SNC745
R2 360
3
15
31
44
VDD
VDD
VDD
VDD
CVDD
CVDD
LXIN
VDD (4.5V)
10
23
43
C5
4.7u
C4
47u
C6
0.1u
R1
220K
45
LXOUT
13
7
RST
VDD (4.5V)
C1
0.1u
TEST
CKSEL
8
330
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
6
9
330
330
330
330
330
330
330
11
12
16
17
18
19
40
39
XIN
C2 15p
Y1
16MHz
XOUT
C3 15p
LS1
2
4
20
21
22
24
25
26
27
28
BP0
BN0
P0.8
P0.9
SPEAKER
P0.10
P0.11
P0.12
P0.13
P0.14
P0.15
42
VO
TR1
29
30
33
34
P1.0
P1.1
P1.2
P1.3
TR2
TR3
TR4
TR5
35
36
37
38
P1.4
P1.5
P1.6
P1.7
TR6
TR7
TR8
4.5V, 16MHz Crystal, PWM
Note:
1. All the ”VDD” should be connected together before connected to the power source
which with a 47uF(C4) capacitor.
2. The capacitor “C5” is near the “CVDD” pin.
12
Ver. 1.3
October 23, 2002