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SNC26060
One Channel Speech Controller
===================== CONTENTS =====================
1. 2. 3. 4. 5. INTRODUCTION............................................................................................................3 FEATURES ......................................................................................................................3 PIN ASSIGNMENT.........................................................................................................4 BLOCK DIAGRAM ........................................................................................................4 FUNCTION DESCRIPTIONS .......................................................................................5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.10 6. 7. 8. OSCILLATOR ...............................................................................................................5 ROM ..........................................................................................................................5 RAM ..........................................................................................................................6 POWER DOWN MODE ..................................................................................................6 SAMPLING RATE COUNTER .........................................................................................6 I/O PORTS ...................................................................................................................6 PWM OUTPUT ............................................................................................................7 WATCH DOG TIMER....................................................................................................7 IR FUNCTION ..............................................................................................................7 PWM IO CONTROL .....................................................................................................7
ABSOLUTE MAXIMUM RATING ..............................................................................7 ELECTRICAL CHARACTERISTICS .........................................................................8 APPLICATION CIRCUIT .............................................................................................9 8.1 8.2 GENERAL APPLICATION ...............................................................................................9 MOTOR APPLICATION ................................................................................................10
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SNC26060
One Channel Speech Controller
AMENDENT HISTORY
Version Ver 1.0 Ver 1.1 Ver 1.2 Ver 1.3 Ver 1.4 Date Nov. 6, 2008 Nov. 17, 2008 Jan. 7, 2009 Feb. 13, 2009 May 6, 2009 First issue Revise CVDD & VDDIO order of "Motor Application" Revise SRAM information 1. Revise Rosc=220K Ohm in Application Circuit part 1. Revise frequency guarantee range in electrical characteristics according IC Test flow Ver 1.5 June 23, 2009 No modification, just revise version following with updating SNC26500 IO numbers. Ver 1.6 Ver 1.7 July 23, 2009 October 14, 2009 Revise system clock with 2.05MHz (typical). 1. Revise PWM output spec condition with BUOx=1/2 VDD (peak value), instead of 1KHz sine wave Description
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SNC26060
One Channel Speech Controller
1. INTRODUCTION
SNC26060 is a one-channel voice synthesizer IC with PWM direct drive circuit. It built in a 4-bit tiny controller with one 4-bit input port and two 4-bit I/O ports. By programming through the tiny controller in SNC26060, user's varied applications including voice section combination, key trigger arrangement, output control, and other logic functions can be easily implemented.
2. FEATURES
Single power supply 2.4V - 5.5V 60 seconds voice capacity are provided (@6KHZ sample rate) Built in a 4-bit tiny controller I/O Port - One 4-bit Input port P1is provided. - Two 4-bit I/O ports P2 and P3 are provided. - The driving/sink current of P2 & P3 is up to 8mA/16mA - The IO pins P2.3 can be modulated with 38.5Khz carry signal to implement IR function. - PWM output for IO (P2.0~P2.3, P3.0~P3.3) (64+16)*4 bits RAM are provided. (Notes : m0~m63 + 16 PWMIO duty registers) Maximum 64k program ROM is provided 128K*12 shared ROM for voice data and program Readable ROM code data Voice Synthesizer: - Single channel speech output. - Support 4-bits SONiX-ASDPCM and 8-bit PCM algorithm Adaptive playing speed from 2.5k-20kHz is provided Built in an PWM circuit output, can directly connected to Speaker for sound output. System clock: 2MHz Event Mark function supported Low Power Detect. Watch Dog Timer Supported
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SNC26060
One Channel Speech Controller
3. PIN ASSIGNMENT
Symbol P10~P13 P20~P23 P30~P33 Rosc BUO1 BUO2 RST CVDD CGND VDDIO GNDIO Test I/O I I/O I/O I O O I I I I I I Function Description Input port 1 I/O port 2: IO I/O port 3: IO Oscillation component connection pin PWM output 1 PWM output 2 RST=1 Reset Chip (Active H) Positive power supply for CPU Negative power supply for CPU Positive power supply for I/O Negative power supply for I/O Test pin
4. Block Diagram
ROM
Program/Speech 128Kx12 bits Address Pointers/ STACK SRAM (64+16 nibbles) Timer ALU Timing Generator
OSC
Sampling Rate Counter
Watch Dog Timer PWM Circuit
Voice Synthesizer PWM IO
Input port 1
IO port 2
IO port 3
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SNC26060
One Channel Speech Controller
5. FUNCTION DESCRIPTIONS 5.1 Oscillator
SNC26060 accepts RC type oscillator for system clock. The typical circuit diagram for oscillator is listed as follows.
VCC OSC
RC Oscillator 5.2 ROM
SNC26060 contains a substantial 128K words (12-bit) internal ROM, which is shared by program and resource data. Program, voice and data are shared within this same 128K words ROM.
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SNC26060
One Channel Speech Controller
5.3 RAM
SNC26060 contains (64+16) nibble RAM <(64+16) x 4-bits>. The 64 nibble RAM is only one page. Another 16 nibbles are 16 PWMIO duty registers. In our programming structure, user can Directly use memory related command, M0 ~ M63 in the data transfer type instructions, to access first 64 nibbles. Another 16 nibbles, user can use PWMxL, PWMxH related command to access when PWMIO function is disabled. (x can be 1~8)
5.4 Power Down Mode
"End" instruction makes the IC entering into Stop Mode will stop the system clock for power savings (<3uA @VDD=3V and <6uA @VDD=4.5V.) Any valid data transition (L H or H L) occurring on any IO pin can be used to start the system clock and return to normal operating mode.
5.5 Sampling Rate Counter
The unique sampling rate counter is designed in voice channel to be able to play diverse voices at different sample playing rates. The playing rate can be adaptively set up among from the wide ranges of 2.5KHz to 20KHz. This architecture yields a high-quality voice synthesis that sounds very close to its original source when played through the same amplifier and speaker circuitry.
5.6 I/O Ports
There are one 4-bit input port P1 and two 4-bit I/O ports P2 and P3. Any I/O can be individually programmed as either input pull low or output. Any valid data transition (H L | L H) of P1,P2 and P3 can reactivate the chip when it is in power-down stage.
Port Data PAD Port Status Weak
To Internal Data Bus
Read Control
I/O Port Configuration Note: (1) Weak N-MOS can serve as pull-low resistor. (2) The driving/sink current of P2 & P3 is up to 8mA/16mA
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SNC26060
One Channel Speech Controller
5.7 PWM Output
An PWM circuit is built-in SNC26060. The maximum resolution of PWM is 8 bits. Two huge output stage circuits are designed in SNC26060. With this advanced circuit, the chip is capable of driving speaker directly without external transistors.
BUO1
BUO2
PWM Output
5.8 Watch Dog Timer
SNC26060 built an internal WDT (Watch Dog Timer). This Watchdog timer would issue resets signal to this chip if it is not cleared before reaching terminal count (128 ms). The watchdog timer is enabled at reset and cannot be disabled.
5.9 IR Function
P23 can be modulated with 38.5KHz square wave before sent out to P23 pin. The IR signal can be achieved by this modulated signal.
5.10
PWM IO control
SNC26060 has support 8 PWM IO (P20~P23, P30~P33). Each I/O has 8 bit independent duty register, and the 8 bit register are compare with 8 bits counter. If set use PWM IO function and internal counter start at 000H, the mapping I/O will set High. The 8 bits counter increment if the same duty register, that will reset the mapping IO pin.
6. ABSOLUTE MAXIMUM RATING
Items Supply Voltage Input Voltage Operating Temperature Storage Temperature Symbol VDD-V VIN TOP TSTG Min -0.3 VSS-0.3 0 -55.0 Max 6.0 VDD+0.3 55.0 125.0 Unit. V V o C o C
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SNC26060
One Channel Speech Controller
7. ELECTRICAL CHARACTERISTICS
Sym. Min. Typ. Max. Unit Condition VDD 2.4 3.0 5.5 V ISBY 3.0 uA VDD=3V, no load 6.0 VDD=4.5V, no load Operating Current IOPR 300 uA VDD=3V, no load Input current of P1, P2, P3 IIH 3.0 uA VDD=3V,VIN=3V Drive current of P2, P3 IOD 6 8 mA VDD=3V,VO=2.4V Sink current of P2, P3 IOS 10 16 mA VDD=3V,VO=2.4V PWM current IPWM 240 mA VDD=3V, BUOx=1.5V PWM current IPWM 310 mA VDD=4.5V, BUOx=2.25V Oscillation Freq. FOSC 1.98 2.05 2.12 MHz VDD=3V, Temp.=25oC @Rosc = 220 Kohm Min : -3% Max : +3% Item Operating Voltage Standby current
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One Channel Speech Controller
8. APPLICATION Circuit 8.1 General application
+
IO1 IO2 IO3 IO4 IO5
Battery Box
It is suggested to add a capacitor (C1), 104, between VDD with GND to keep power stable with general application. And this capacitor is strongly suggested to be as close to the chip as possible.
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SNC26060
One Channel Speech Controller
8.2 Motor application
Separate CPU power path with power path of large current application
+
IO1 IO2
8050 8050
Battery Box
IO3 IO4 IO5
Separate CPU GND with large current application GND
There are some suggestions about PCB layout when user use SNC26000 series IC with motor applications. (1) The capacitor C1 (104) C2 (104)is strongly suggested to be as close to the chip as possible. (2) It had better let OSC components (R) get close to IC chip. (3) OSC components had better get far away large current applications. (4) Separate IC power path with large current application power path to avoid affect IC working by power drop from large current application. (5) R2 (10)separate VDDIO and CVDD. (6) Let power cable thicker, especially for large current application. (7) C3 and C4 (104) are connected at the positive point and negative point of the motor.
Ver: 1.7
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SNC26060
One Channel Speech Controller
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October 14, 2009

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