General Description

The HT827A0 is 8-bit high performance microcontroller with a voice synthesizer and tone generator. They are designed for applications on multiple I/Os with sound effects. The LSIs provide 26 kinds of voice sampling rates, 4 octaves of tone level as well as a high quality of current type D/A output. With such a flexible structure, the HT827A0 is excellent for versatile voice and sound effect product applications. It also includes a halt function to reduce power consumption.

Features

8-bit microcontroller

• Operating voltage: 2.4V~5.2V

• 8Kx16 program ROM

• 208x8 data RAM

• 36 bidirectional I/O lines

• Interrupt input

• 16-bit programmable timer/event counter with overflow interrupts

• Watchdog timer

• On-chip crystal or RC types of oscillator

• Halt function and wake-up feature reduces power consumption

• 63 powerful instructions

• Up to a 1μs instruction cycle with a 4MHz system clock at VDD=5V

• All instructions in 1 or 2 machine cycles

• 16-bit table read instruction

• 8-level subroutine nesting

• Bit manipulation instruction

Voice and melody synthesizer

• 128Kx8 voice ROM

• 3/4 bit ADPCM coding algorithm

• 26 kinds of voice sampling rates

• Tone level of 4 octaves

• 14 kinds of melody beats

• Current type of D/A switch output

• Tone generator counter

• Controllable volume

• 48-pin DIP package

Applications

• Intelligent educational toys

• High end toy controllers

• Talking alarm clocks

• Alert and warning systems

• Public address systems

• Sound effect generators