SNC538 Datasheet | SONiX

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 bination, 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-20k Hz 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 November 26, 2002 3 Block Diagram Two Channel Direct Drive Speech Controller Program/Speech 40K×10 bits Address Pointers/ STACK Timing Generator SRAM (128 nibbles) Sampling Rate Counter × 2 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 ~ P60 VDD GND RST OSC BUO1/VO BUO2 I/O Function Description I Bit3 ~ Bit0 of Input port 1 I/O Bit3 ~ Bit0 of I/O port 2 I/O Bit3 ~ Bit0 of I/O port 3 O Bit3 ~ Bit0 of Output port 4 O Bit3 ~ Bit0 of Output port 5 I/O Bit3 ~ Bit0 of I/O port 6 P Positive power supply P Negative power...