Chapter 1
Hardware Structure
This section is the main datasheet section of the Cost-Effective I/O Type microcontroller hand
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book and contains all the parameters and information related to the hardware. The information
contained provides designers with details on all the main hardware features of the Cost-Effective
I/O Type MCU series which together with the programming section contains the information to en
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able swift and successful implementation of user microcontroller applications. By proper consulta
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tion of the relevant parts of this section, users can ensure that they make the most efficient use of
the flexible and multi-function features within the Cost-Effective I/O Type microcontroller series.
Introduction
The HT48R05A-1/HT48C05, HT48R06A-1/HT48C06, HT48R07A-1/HT48C07, HT48R08A-1/
HT48C08 and HT48R09A-1/HT48C09 are 8-bit high performance, cost-effective RISC architec-
ture microcontroller devices specifically designed for multiple I/O control product applications. De-
vice flexibility is enhanced with their internal special features such as HALT and wake-up
functions, oscillator options, buzzer driver, etc. These features combine to ensure applications re-
quire a minimum of external components and therefore reduce overall product costs. Having the
advantages of low power consumption, high performance, I/O flexibility as well as low-cost, these
devices have the versatility to suit a wide range of application possibilities such as industrial con-
trol, consumer products, subsystem controllers, etc. All devices share the same functions and fea-
tures, their main difference is in Data Memory and Program Memory capacity.
The HT48R05A-1, HT48R06A-1, HT48R07A-1, HT48R08A-1 and HT48R09A-1 are OTP devices
offering the advantages of easy and effective program updates, using the Holtek range of develop
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ment and programming tools. These devices provide the designer with the means for fast and cost
effective product development cycles. However, for applications that are at a mature state in their
design process, the HT48C05, HT48C06, HT48C07, HT48C08 and HT48C09 mask version de
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vices offer a complementary device for products with high volume and low-cost demands. Fully
pin and functionally compatible with their OTP version devices, such mask version devices pro
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vide the ideal substitute for products which have gone beyond their development cycle and are fac
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ing cost down demands.
Chapter 1 Hardware Structure
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