Two Channel Direct Drive Speech Controller
SNC538
Two Channel Direct Drive Speech Controller
1 INTRODUCTION
SNC538 is a two-channel voice synthesizer IC with PWM d...
Description
SNC538
Two Channel Direct Drive Speech Controller
1 INTRODUCTION
SNC538 is a two-channel voice synthesizer IC with PWM direct drive circuit. It built-in a 4-bit tiny controller with one 4-bit input port, two 4-bit output ports and three 4-bit I/O ports. By programming through the tiny controller in SNC538, 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 13 seconds voice capacity are provided(@6KHZ sample rate) Built in a 4-bit tiny controller One 4-bit input port, two 4-bit output ports and three 4-bit I/O ports are provided 128*4 bits RAM are provided 40K*10 ROM size are provided for voice data and program Maximum 16k program ROM is provided Readable ROM code data IR carrier signal is provided Built in a high quality speech synthesizer Adaptive playing speed from 2.5k-20kHz is provided Two independent voice channels (Channel 1 + Channel 2→Buo1,Buo2) Built in a PWM Direct Drive circuit and a fixed current D/A output System clock : 2MHz Low Power Reset
Ver: 1.2
1
November 26, 2002
3 Block Diagram
SNC538
Two Channel Direct Drive Speech Controller
ROM
Program/Speech 40K×10 bits
Address Pointers/ STACK
Timing Generator
OSC
SRAM (128 nibbles)
Sampling Rate Counter × 2
PWM
Timer ALU
Voice
Synthesizer
D/A
IO1
IO2
IO3
IO4
IO5
IO6
4 PIN ASSIGNMENT
Symbol P13 ~ P10 P23 ~ P20 P33 ~ P30 P43 ~ P40 P53 ~ P50 P63 ~ P6...
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