HT86BXX pdf datasheet (Enhance

The Voice type series of MCUs are 8-bit high perfor-
mance microcontrollers which include a voice synthe-
sizer and tone generator. They are designed for
applications which require multiple I/Os and sound ef-
fects, such as voice and melody. The devices can pro-
vide various sampling rates and beats, tone levels,
tempos for speech synthesizer and melody generator.
They also include an integrated high quality, voltage
type DAC output. The external interrupt can be trig-
gered with falling edges or both falling and rising edges. The devices are excellent solutions for versatile voice
and sound effect product applications with their efficient
MCU instructions providing the user with programming
capability for powerful custom applications. The system
frequency can be up to 8MHz at an operating voltage of
2.2V and include a power-down function to reduce
power consumption.