SNC745

16-bit Voice Processor

Ver. 1.3

October 23, 2002

13

I/O and VDD 4.5V, CVDD 3V, 16MHz ROSC, DA output

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.

U1

SNC745

VDD

3

VDD

10

VDD

23

VDD

43

CVDD

31

CVDD

15

RST

13

BP0

2

BN0

4

VO

42

XIN

40

XOUT

39

LXIN

44

LXOUT

45

TEST

7

CKSEL

6

P0.0

8

P0.1

9

P0.2

11

P0.3

12

P0.4

16

P0.5

17

P0.6

18

P0.7

19

P0.8

20

P0.9

21

P0.10

22

P0.11

24

P0.12

25

P0.13

26

P0.14

27

P0.15

28

P1.0

29

P1.1

30

P1.2

33

P1.3

34

P1.4

35

P1.5

36

P1.6

37

P1.7

38

R1

220K

C1

0.1u

LS1

SPEAKER

C4

47u

TR5

TR6

TR7

TR8

TR1

TR2

TR3

TR4

C5

4.7u

C6

0.1u

BT1

BATTERY

BT2

BATTERY

3V

4.5V

Y1

32768

C7

15p

C8 15p

VR1

75K

VR2

100K

Q1

8050

R7

R

VDD

VDD

VCC