SNC725

SNC725 16-bit Voice Processor 1. INTRODUCTION SNC725 is a 16mins two-channel speech/melody and 4-channel wave-table melody voice chip. It based on reduced 16-bit fixed-point DSP architecture. SNC725 provides user some necessary and efficient DSP instructions. Furthermore, SNC725 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: 96K*16 bits Total ROM size: 128K*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, 1...