HT86R384 pdf datasheet (Voice

The HT86R384 series are 8-bit high performance
microcontroller with voice synthesizer and tone generator.
The HT86R384 is designed for applications on multiple
I/Os with sound effects, such as voice and melody.
It can provide various sampling rates and beats, tone
levels, tempos for speech synthesizer and melody generator.
It has a single built-in high quality, D/A output.
There is an external interrupt which can be triggered
with falling edge pulse or falling/rising edge pulse.
The HT86R384 is excellent for versatile voice and
sound effect product applications. The efficient MCU instructions
allow users to program the powerful custom
applications. The system frequency of HT86R384 can
be up to 8MHz under 2.4V and include a HALT function
to reduce power consumption.