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SNC735
16-bit Voice Processor
1. INTRODUCTION
SNC735 is a 32mins two-channel speech/melody and 4-channel wave-table melody voice chip. It based on reduced 16-bit fixed-point DSP architecture. SNC735 provides user some necessary and efficient DSP instructions. Furthermore, SNC735 provide one 10-bit PWM and one 10-bit DA converter to driving speaker for speech/melody output. User can select PWM or DA by programming DA/PWM control register, and only one function can be active at the same time.
2. FEATURES
w w w w w Power supply: 2.4V ~ 3.6V (for 2 battery application) 3.6V ~ 5.1V (for 3 battery application) Built-in a 16-bit DSP (Very Light Structure) Software-based voice/melody processing Rich Function Instruction Set System Clock - 16MHz crystal or R-C type oscillator for system clock - 0.25s real time clock is form 32768Hz crystal 8 MIPS CPU performance I/O Ports: - 16 I/O pins (P0.0~P0.15) and 8 input pins (P1.0~P1.7) - P0.15 with IR carrier signal RAM size: 2K*16 bits High performance program ROM: 32K*16 bits Data ROM size: 224K*16 bits Total ROM size: 256K*16 bits Maximum program size: 64K word 8 Interrupt Sources - 4 for Internal Timer (timer0, 1, 2 and RTC) - 4 for External (P0.0~P0.3) Two voice/melody channels Three 8-bit timer with auto-reload function Built in a 10-bit PWM Direct Drive circuit and a fixed current D/A output Sampling Rate: 6KHz ~16KHz Built-in software voice synthesizer (multiple bit-rate solution 2Kbps, 3.6Kbps, 5Kbps, 6Kbps, 8Kbps, 10Kbps, 12Kbps, 14Kbps, 16Kbps, 20Kbps, 24Kbps and 29Kbps @8K sampling rate) Built-in software melody synthesizer includes the dual-tone melody and 4-ch wave-table melody. Low Voltage Reset
w w
w w w w w w
w w w w w
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Ver: 1.2
1
October 23, 2002
SNC735
16-bit Voice Processor
3. PIN ASSIGNMENT
Symbol P0.0 ~ P0.15 P1.0 ~ P1.7 CVDD VDD GND BP0 BN0 VO XIN XOUT LXIN LXOUT CKSEL RST TEST I/O I/O I I I I O O O I O I O I I I Descriptions I/O port 0 Input port 1 Positive power supply for core circuit Positive power supply Negative power supply PWM output 1 PWM output 2 DA output High speed clock crystal input / RC-type oscillator input High speed clock crystal output / RC-type oscillator input Low speed clock crystal input Low speed clock crystal output Crystal/RC-type oscillator select for high speed clock Chip reset For test only
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October 23, 2002
SNC735
16-bit Voice Processor
4. ROM TABLE
The total ROM size is 256K words. But only 64K words ROM for programming. And 32K words of all is the high speed program ROM. The high-low speed ratio is 1:16, that is to say, if the instruction cycle is two clocks at high speed ROM, the instruction cycle will down to 32 clocks at low speed ROM.
0x000000 0x007FFF 0x008000 0x00FFFF 0x010000 Hi-Speed ROM (32K words) Low-Speed program ROM (32K words) Low-Speed Data ROM (224K words)
Total ROM size (256K words)
Data ROM
0x03FFFF
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SNC735
16-bit Voice Processor
5. RAM TABLE
Total RAM size is 2K words, and one bank is 512 words. If user need playing voice (2Kbps, 3.6Kbps, 12Kbps, dual-tone melody and 4-ch wave-table melody), the system will reserve 1.5K words RAM size.
0x0000 Bank0 0x01FF 0x0200 Bank1 0x03FF 0x0400 Bank2 0x05FF 0x0600 Bank3 0x07FF Free for User Reserved for OS and Voice Algorithm
6. System Clock
The system clock source also can be selected from 16Mhz crystal or ROSC. For the ROSC, user should connect two resistors in the pin "XIN" and "XOUT" instead of 16MHZ crystal. Beside, the clock source select pin "CKSEL" also should be connected to VDD for ROSC. In order to get an accurate system clock by ROSC, the real time clock source is recommended to connect a 32768HZ crystal for system clock calibration.
Ver: 1.2
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October 23, 2002
SNC735
16-bit Voice Processor
7. I/O PORT
SNC735 provides one a 16-bit I/O port and an 8-bit input port for user application (P0.0~P0.15, P1.0~P1.7). The input pull high resistor of each pin can be programmed by Port Pull-High register. The direction of I/O port is selected by Port Direction register. The Port0 (P0.0~P0.15) and Port1 (P1.0~P1.7) can wake the chip up from the stop mode and watch mode. P0.15 can be modulated with a 38.5Khz carry signal to realize IR signal transmission.
Pull-Up Resister
Pull-Up Select In/Out Control
PAD
Latch
to internal bus
In/Out Control
I/O Configuration of P0.0~P0.15
Pull-Up Resister
Pull-Up Select
PAD
Digital In Input Control
Input Port Configuration of Port 1 (P1.0~P1.7)
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October 23, 2002
SNC735
16-bit Voice Processor IREN P0.15 Overflow Timer2 2 P0.15 Modulated with a carry signal
I/O Pad
8. TIMER/COUNTER
SNC735 provides three 8 -bit timer/event counters (T0/T1/T2). Each timer is 8-bit binary up-count timer with pre-scalar and auto-reload function. Timer 0 (T0) is used when voice playing, so user should avoid to use T0.
(system clock)/2*
/2 /4 /8
Enable
TnC (8-bit)
If equal, Time out
MU
8-bit Up Counter
comparator
/256
Pre-scalar
clear
Auto-reload
9. DAC & PWM
To play out voices, SNC735 contains two different solutions, DAC and PWM, for the users' applications. The user can choose one of these two solutions in his design. Only one function can be activated at one time. DAC: A 10-bit current type digital-to-analog converter is built-in SNC735. The relationship between input digital data and output analog current is listed in the following table. Also, the recommended application circuit is illustrated as follows.
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SNC735
16-bit Voice Processor Input data 0 1 ... N ... 1024 Typical value of output current (mA) 0 3/1024 n*(3/1024) 3
PWM: A PWM (pulse width modulation) circuit is built-in SNC735. PWM can convert input digital data into pulse trains with suitable different pulse width. The maximum resolution of PWM is 10 bits. Two huge output stage circuits are included in SNC735. Both of them are capable of driving speaker directly. The recommended application circuit is as follows.
BP0 BN0
SPEAKER
DAC output
PWM output
Ver: 1.2
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October 23, 2002
SNC735
16-bit Voice Processor
10. ABSOLUTE MAXIMUM RATINGS
Items Supply Voltage Input Voltage Operating Temperature Storage Temperature Symbol VDD-V VIN TOP TSTG Min -0.3 GND-0.3 -20.0 -55.0 Max 6.0 VDD+0.3 70.0 125.0 Unit. V V o C o C
11. ELECTRICAL CHARACTERISTICS
Item Operating Voltage Standby current Operating Current Input current of P0, P1 Drive current of P0 Sink Current of P0 Drive current of Buo1 Sink Current of Buo1 Drive Current of Buo2 Sink Current of Buo2 Oscillation Freq. (crystal) Sym. Min. Typ. Max. Unit Condition VDD 2.4 3.6 V *1. VDD 3.6 5.1 V *2. ISBY 2.0 uA VDD=3V, no load IOPR 5 mA VDD=3V, no load IIH 10.0 uA VDD=3V,V IN=3V IOD 10 mA VDD=3V,V O=2.4V IOS 12 mA VDD=3V,V O=0.4V IOD 100 120 mA VDD=3V,Buo1=1.5V IOS 100 120 mA VDD=3V,Buo1=1.5V IOD IOS FOSC 100 100 120 120 16.0 mA VDD=3V,Buo2=1.5V mA VDD=3V,Buo2=1.5V MHz VDD=3V
Note: 1. For 2 battery application. 2. For 3 battery application, user should add 1 resister between power and CVDD pin of chip.
Ver: 1.2
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October 23, 2002
SNC735
16-bit Voice Processor The relationship between ROSC and voltage (Typical) Ta = 25 C Frequency unit: MHz
17.4 17.2 17 16.8 16.6 16.4 16.2 16 15.8 15.6 15.4 15.2 2.0 V 2.2 V 2.4 V 2.6 V 2.8 V 3.0 V 3.2 V 3.4 V 3.6 V 3.8 V 4.0 V
Frequency
Voltage
The relationship between Frequency and Resister (R2) for ROSC (Typical) Ta = 25 C, R1 = 75K Frequency unit: MHz 18 17
Frequency
16 15 14 13 12 11 10 74K 82K 91K 100K 110K 120K 130K
Resister Value
Ver: 1.2
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October 23, 2002
SNC735
16-bit Voice Processor
The relationship between operating current and voltage (Typical) Ta = 25 C Current unit: mA
7
Current
6 5 4 3 2 1.8 V 2.4 V 3V 4.1 V
Voltage
Ver: 1.2
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October 23, 2002
SNC735
16-bit Voice Processor
12. APPLICATION CIRCUIT
VDD (3V)
U1 VDD
SNC735
C4 47u CVDD CVDD LXIN
C6 0.1u
3 14
VDD VDD VDD VDD
6 25 41
C5 4.7u
R1 220K
29 42
23
C1 0.1u S1 RESET
LXOUT RST TEST P0.0 CKSEL P0.1 P0.2
40
8 7
9 10 11 12 13 16 17 18 19 20 21 22 26 27 28 30
TR1
330 330 330 330 330 330 330 330
45
C2 15p Y1 16MHz
P0.3 XIN P0.4
46
C3 15p
P0.5 XOUT P0.6 P0.7
LS1 SPEAKER
2 4 43
BP0 BN0 VO
P0.8 P0.9 P0.10 P0.11 P0.12 P0.13 P0.14 P0.15 P1.0
31
TR2
TR5
P1.1
32
TR3
35
TR6
P1.4 P1.2
33
TR4
36
TR7
P1.5 P1.3
34
38
TR8
P1.6
39
GND
GND
GND
GND
GND 37
15
24
3V, 16MHz Crystal, PWM Note: 1. All the "VDD" and "CVDD" 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.
Ver: 1.2
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44
1
5
GND
P1.7
October 23, 2002
SNC735
16-bit Voice Processor
VDD (4.5V)
U1
SNC735 R2 360
3
VDD (4.5V)
VDD VDD VDD VDD
CVDD CVDD LXIN
6 25 41
C5 4.7u C4 47u C6 0.1u
14 29
R1 220K
42
23
C1 0.1u
LXOUT RST TEST P0.0 CKSEL P0.1 P0.2 P0.3 XIN P0.4 P0.5 XOUT P0.6 P0.7
40
VDD (4.5V)
8 7
9 10 11 12 13 16 17 18 19 20 21 22 26 27 28 30
TR1
330 330 330 330 330 330 330 330
45
C2 15p Y1 16MHz
46
C3 15p
LS1 SPEAKER
2 4 43
BP0 BN0 VO
P0.8 P0.9 P0.10 P0.11 P0.12 P0.13 P0.14 P0.15 P1.0
31
TR2
TR5
P1.1
32
TR3
35
TR6
P1.4 P1.2
33
TR4
36
TR7
P1.5 P1.3
34
38
TR8
P1.6
39
P1.7
GND
GND
GND
GND
GND 37
15
24
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.
Ver: 1.2
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44
1
5
GND
October 23, 2002
SNC735
16-bit Voice Processor
VDD BT2 BT1
4.5V
3V
SNC735 U1
BATTERY BATTERY
3 14
C6 R1 220K 0.1u C4
VDD VDD VDD VDD
CVDD CVDD LXIN
6 25 41
C5 4.7u C7 15p Y1 32768
29
47u
42
23
C1 0.1u VDD
LXOUT RST TEST P0.0 CKSEL P0.1 P0.2
40
C8 15p
8 7
9 10 11 12 13 16 17 18 19 20 21 22 26 27 28 30
TR1
VR1 75K VR2
45
P0.3 XIN P0.4
46
100K VDD LS1 SPEAKER 8050
P0.5 XOUT P0.6 P0.7
2 4 43
Q1 R7 R
BP0 BN0 VO
P0.8 P0.9 P0.10 P0.11 P0.12 P0.13 P0.14 P0.15 P1.0
31
TR2
TR5
P1.1
32
TR3
35
TR6
P1.4 P1.2
33
TR4
36
TR7
P1.5 P1.3
34
38
TR8
P1.6
39
P1.7
GND
GND
GND
GND
GND 37
15
24
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.
Ver: 1.2
13
44
1
5
GND
October 23, 2002
SNC735
16-bit Voice Processor
13. BONDING PAD
P 0.15 P 0.14 P 0.13 P 0.12 P 0.10 P 0.11
G ND
V DD
V DD
G ND
P 1.7
P 1.6
P 1.5
P 1.4
P 1.3
P 1.2
P 1.1
P 1.0
39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 LXOUT LXIN VDD VO GND XIN XOUT 40 41 42 43 44 45 46 18 17 16 15 14 13 12 11 (0,0) 10 9 8 7 6 P0.8 P0.7 P0.6 P0.5 GND VDD P0.4 P0.3 P0.2 P0.1 P0.0 TEST CKSEL VDD
P 0.9
RST
5 4 3 2 1
GND BN0 VDD BP0 GND
Note: The substrate MUST be connected to Vss in PCB layout.
Ver: 1.2
14
October 23, 2002
SNC735
16-bit Voice Processor
DISCLAIMER
The information appearing in SONiX web pages ("this publication") is believed to be accurate. However, this publication could contain technical inaccuracies or typographical errors. The reader should not assume that this publication is error-free or that it will be suitable for any particular purpose. SONiX makes no warranty, express, statutory implied or by description in this publication or other documents which are referenced by or linked to this publication. In no event shall SONiX be liable for any special, incidental, indirect or consequential damages of any kind, or any damages whatsoever, including, without limitation, those resulting from loss of use, data or profits, whether or not advised of the possibility of damage, and on any theory of liability, arising out of or in connection with the use or performance of this publication or other documents which are referenced by or linked to this publication. This publication was developed for products offered in Taiwan. SONiX may not offer the products discussed in this document in other countries. Information is subject to change without notice. Please contact SONiX or its local representative for information on offerings available. Integrated circuits sold by SONiX are covered by the warranty and patent indemnification provisions stipulated in the terms of sale only. The application circuits illustrated in this document are for reference purposes only. SONIX DISCLAIMS ALL WARRANTIES, INCLUDING THE WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PURPOSE. SONIX reserves the right to halt production or alter the specifications and prices, and discontinue marketing the Products listed at any time without notice. Accordingly, the reader is cautioned to verify that the data sheets and other information in this publication are current before placing orders. Products described herein are intended for use in normal commercial applications. Applications involving unusual environmental or reliability requirements, e.g. military equipment or medical life support equipment, are specifically not recommended without additional processing by SONIX for such application.
Ver: 1.2
15
October 23, 2002

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