Preliminary

SNC749

16-bit Voice Processor

Ver. 1.8

March 6, 2007

4

Low Voltage Reset

Low Voltage Detect

Sampling Rate: 8KHz ~16KHz

Built-in software voice synthesizer (LRC5：1.5K, 1.72K, 2K, 2.4K, 3K, 4K

DRC：5K, 6K

SN：8K

MSADPCM：35K

PCM：80K

AUDIO32_16K：16K, 20K, 24K, 28K, 32K)

Built-in software melody synthesizer includes the dual-tone melody and 12-channel

wave-table melody.

3. PIN ASSIGNMENT

Pin No.

Symbol

I/O

Descriptions

1

Test

I

Test Pin for testing using

2

VSSIO2

I

Negative power supply

3

CVSS

I

Negative power supply for core circuit

4

RST

I

Chip reset

5

CKSEL

I

Crystal/RC-type oscillator select for high speed clock

6

VDDIO2

I

Positive power supply

7

CVDD

I

Positive power supply for core circuit

8

REGOUT

O

Regulator voltage output

9

VSSA

I

Negative power supply

10

XIN

I

High speed clock crystal input

11

XOUT

O

High speed clock crystal output

12

LXIN

I

Low speed clock crystal input

13

LXOUT

O

Low speed clock crystal output

14

VDDA

I

Positive power supply

15

NC

-

-

16

P0.0

I/O

I/O Port 0

17

P0.1

I/O

I/O Port 0

18

P0.2

I/O

I/O Port 0

19

P0.3

I/O

I/O Port 0

20

VSSIO0

I

Negative power supply

21

P0.4

I/O

I/O Port 0

22

P0.5

I/O

I/O Port 0

23

P0.6

I/O

I/O Port 0

24

P0.7

I/O

I/O Port 0

25

VDDIO0

I

Positive power supply

26

P0.8

I/O

I/O Port 0

27

P0.9

I/O

I/O Port 0

28

P0.10

I/O

I/O Port 0

29

P0.11

I/O

I/O Port 0

30

VSSIO0

I

Negative power supply