HT86BXX/HT86BRXX
Enhanced Voice 8-Bit MCU
Technical Document
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Application Note
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HA0075E MCU Reset and Oscillator Circuits Application Note
Features
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Operating voltage: 2.2V~5.5V
System clock: 4MHz~8MHz
Crystal and RC system oscillator
16/20/24 I/O pins
External RC oscillator converter
8 capacitor/resistor sensor input
Watchdog timer function
8-level subroutine nesting
Low voltage reset function
8K´16-bit Program Memory
192´8/384´8-bit Data Memory
External interrupt input
Integrated voice ROM with various capacities
Power-down function and wake-up feature reduce
power consumption
Three 8-bit programmable Timers with overflow
interrupt and 8-stage prescaler
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Up to 0.5ms instruction cycle with 8MHz system clock
at VDD= 5V
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12-bit high quality voltage type D/A output
PWM circuit direct audio output
63 powerful instructions
General Description
Device Types
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.
Devices which have the letter ²BR² within their part
number, indicate that they are OTP devices offering the
advantages of easy and effective program updates, us-
ing the Holtek range of development and programming
tools. These devices provide the designer with the
means for fast and low-cost product development cy-
cles. Devices which have the letter ²B² within their part
number indicate that they are mask version devices.
These devices offer a complementary device for appli-
cations that are at a mature state in their design process
and have high volume and low cost demands.
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.
Part numbers including ²R² are OTP devices, all others
are mask version devices.
Fully pin and functionally compatible with their OTP sis-
ter devices, the mask version devices provide the ideal
substitute for products which have gone beyond their
development cycle and are facing cost-down demands.
In this datasheet, for convenience, when describing de-
vice functions, only the OTP types are mentioned by
name, however the same described functions also ap-
ply to the Mask type devices.
Rev. 1.70
1
February 22, 2010
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