GENERAL DESCRIPTION

The W523X is a programmable speech synthesis IC that utilizes the ADPCM coding method to generate all types of voice effects. The W523Xs LOAD and JUMP commands and four programmable registers provide powerful user-programmable functions that make this chip suitable for an extremely wide range of speech IC applications.

FEATURES

· Wide operating voltage range: 1.2 to 3.6 volts

· Programmable speech synthesizer

· 4-bit ADPCM synthesis method and 8-bit D/A converter

· RC oscillator with built-in capacitor; voice output frequency typically at 6 KHz

· Provides 4 trigger inputs

· Drives 2 flash LEDs for two batteries

· 3 STOP output signals

· Flexible functions programmable through the following:

- LD (load), JP (jump) commands

- Four registers: R0, EN, STOP, and MODE

- Conditional instructions

- Speech equation

- Global repeat (GR) setting

· Programmable power-on initialization (POI), which can be interrupted by trigger inputs

· Interrupt or non-interrupt for rising or falling edge of each trigger pin (this feature determines

retriggerable, non-retriggerable, overwrite, and non-overwrite features of each trigger pin)

· LED On/Off control can be set independently in each GO instruction of speech equation

· Independent control of LED1 and LED2

· Total of 256 voice group entries available for programming (including eight hardware and 248 software group entry points)

· 20 to 40 mS debounce time