HT46R4A
Cost-Effective A/D Type 8-Bit MCU
Technical Document
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Features
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Operating voltage:
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Up to 0.5ms instruction cycle with 8MHz system clock
f
SYS
=4MHz: 2.2V~5.5V
f
SYS
=8MHz: 3.3V~5.5V
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Max of 27 bidirectional I/O lines
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External interrupt input shared with I/O line
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Two 8-bit programmable Timer/Event Counters with
at V
DD
=5V
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6-level subroutine nesting
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6 channel 9-bit resolution A/D converter
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Dual channel 8-bit PWM output shared with I/O lines
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Bit manipulation instruction
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Table read instructions
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63 powerful instructions
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All instructions executed in one or two machine
overflow interrupt
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Integrated crystal and RC oscillator
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Watchdog Timer
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4096´15 program memory
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192´8 data memory
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PFD for audio frequency generation
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Power down and wake-up functions to reduce power
cycles
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Low voltage reset function
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28-pin SKDIP/SOP, 32-pin DIP, 44-QFP package
consumption
General Description
The HT46R4A is a device from the Cost-Effective A/D
Type Series of MCUs. As an 8-bit high performance
RISC architecture microcontroller, the device is de-
signed especially for applications that interface directly
to analog signals, such as those from sensors. The de-
vices include an integrated multi-channel Analog to Dig-
ital Converter in addition to two Pulse Width Modulation
outputs.
The usual Holtek MCU features such as power down
and wake-up functions, oscillator options, programma-
ble frequency divider, etc. combine to ensure user appli-
cations require a minimum of external components.
The benefits of integrated A/D and PWM functions, in
addition to low power consumption, high performance,
I/O flexibility and low-cost, provides the device with the
versatility to suit a wide range of application possibilities
such as sensor signal processing, motor driving, indus-
trial control, consumer products, subsystem controllers,
etc.
As is the case with all Holtek microcontroller devices,
the HT46R4A is fully supported by a full suite of
profesional hardware and software tools, containing
comprehensive features to ensure user applications are
designed and debugged in as short a time as possible.
Rev. 1.00
1
November 28, 2007
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
