Preliminary
============ CONTENTS ============
SNC749
16-bit Voice Processor
1. INTRODUCTION ..............................................................................................................................3
2. FEATURES.........................................................................................................................................3
3. PIN ASSIGNMENT ...........................................................................................................................4
4. ROM TABLE......................................................................................................................................6
5. RAM TABLE ......................................................................................................................................7
6. SYSTEM CLOCK ..............................................................................................................................8
6.1 C
RYSTAL
I
NPUT
.................................................................................................................................8
6.2 ROSC I
NPUT
......................................................................................................................................8
7. I/O PORT ............................................................................................................................................9
8. TIMER/COUNTER .........................................................................................................................10
9. PUSH-PULL DAC............................................................................................................................11
10. REGULATOR ................................................................................................................................11
11. ABSOLUTE MAXIMUM RATINGS...........................................................................................12
12. ELECTRICAL CHARACTERISTICS ........................................................................................12
13. APPLICATION CIRCUIT............................................................................................................13
14. BONDING PAD..............................................................................................................................15
Ver. 1.8
1
March 6, 2007
Preliminary
History
Version
1.0
1.1
1.2
1.3
Release Date
8/29/2006
8/31/2006
9/6/2006
9/7/2006
1. First release.
1. Add contents page.
1. Add electrical characteristics descript.
1. Modify feature descript error.
2. Redefine pin name.
3. Modify system clock descript.
4. Modify electrical characteristics.
5. Add history page.
6. Add Bonding PAD map.
1. Add Application circuit.
1. Remove current DAC function.
1. Remove current DAC output pin.
1. Add ROSC application circuit.
1. Modify application error.
2. Add Regulator section.
Descript
SNC749
16-bit Voice Processor
1.4
1.5
1.6
1.7
1.8
1/16/2007
01/25/2007
02/26/2007
03/01/2007
03/06/2007
Ver. 1.8
2
March 6, 2007
Preliminary
SNC749
16-bit Voice Processor
1. INTRODUCTION
The SNC749 is a simply chip base on new DSP technology. SNC749 provide
simply and easy control functions for system manufactory. SNC749 also is a high
performance voice IC. That is built-in 64K word high speed ROM, and by different
model to built-in 64K word, 448K words low speed ROM, the maximum program size is
full ROM size include high-speed and low-speed ROM.
The SNC749 have three timer, one real time clock and one watchdog timer and
built-in a hi-performance software synthesizer to provide lot of voice effects, such as
hi-decompression engine to support from 1.5Kbps ~ 32Kbps compression rate for
speech and music, multi-channel voice synthesizer to provide 12-channel wave table
melody.
2. FEATURES
Power supply: 2.4V ~ 3.6V (for 2 batteries application)
3.6V ~ 5.1V (for 3 batteries application)
Built-in a new 16-bit DSP core with 16 MIPS CPU performance
Software-based voice/melody processing
Rich Function Instruction Set
System Clock
−
16MHz crystal or R-C type oscillator for system clock
I/O Ports:
−
24 I/O pins (P0.0~P0.15, P1.0~P1.7)
−
P0.15 with IR carrier signal
RAM size: 4K*16 bits
ROM size: 512KW
−
High performance program ROM: 64K*16 bits
−
Low speed ROM: 448KW
Maximum program size: Full ROM Size
3 Timer, 1 RTC, 1 WDT
- Timer With Individual pre-scalar and auto-reload function
- RTC with 0.25/0.5/1 sec period
- Watchdog Timer
9 Interrupt Sources
−
4 for Internal Timer (timer0, 1, 2 and RTC)
−
4 for External (P0.0~P0.3)
−
1 for DA (Push Pull DAC)
Two voice channels / 12 melody channels
Three 8-bit timer with auto-reload function
Built in a 10-bit Push-Pull DAC direct drive circuit
Internal regulator provided
Ver. 1.8
3
March 6, 2007
Preliminary
SNC749
16-bit Voice Processor
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.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Symbol
Test
VSSIO2
CVSS
RST
CKSEL
VDDIO2
CVDD
REGOUT
VSSA
XIN
XOUT
LXIN
LXOUT
VDDA
NC
P0.0
P0.1
P0.2
P0.3
VSSIO0
P0.4
P0.5
P0.6
P0.7
VDDIO0
P0.8
P0.9
P0.10
P0.11
VSSIO0
I/O
I
I
I
I
I
I
I
O
I
I
O
I
O
I
-
I/O
I/O
I/O
I/O
I
I/O
I/O
I/O
I/O
I
I/O
I/O
I/O
I/O
I
Descriptions
Test Pin for testing using
Negative power supply
Negative power supply for core circuit
Chip reset
Crystal/RC-type oscillator select for high speed clock
Positive power supply
Positive power supply for core circuit
Regulator voltage output
Negative power supply
High speed clock crystal input
High speed clock crystal output
Low speed clock crystal input
Low speed clock crystal output
Positive power supply
-
I/O Port 0
I/O Port 0
I/O Port 0
I/O Port 0
Negative power supply
I/O Port 0
I/O Port 0
I/O Port 0
I/O Port 0
Positive power supply
I/O Port 0
I/O Port 0
I/O Port 0
I/O Port 0
Negative power supply
Ver. 1.8
4
March 6, 2007
Preliminary
SNC749
16-bit Voice Processor
Pin No.
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
Symbol
P0.12
P0.13
P0.14
P0.15
P1.0
P1.1
P1.2
P1.3
VDDIO1
P1.4
P1.5
P1.6
P1.7
VSSIO1
VSSPP
BP0
VDDPP
BN0
VSSPP
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I
I/O
I/O
I/O
I/O
I
I
O
I
O
I
I/O Port 0
I/O Port 0
I/O Port 0
I/O Port 0
I/O Port 1
I/O Port 1
I/O Port 1
I/O Port 1
Descriptions
Positive power supply
I/O Port 1
I/O Port 1
I/O Port 1
I/O Port 1
Negative power supply
Negative power supply
Push Pull output 1
Positive power supply
Push Pull output 2
Negative power supply
Ver. 1.8
5
March 6, 2007
微控制器 MCU
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
