Chapter 1
Hardware Structure
This section is the main datasheet section of the I/O Type microcontroller handbook and contains
all the parameters and information related to the hardware. The information contained provides de
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signers with details on all the main hardware features of the I/O Type microcontroller range which
together with the programming section contains the information to enable swift and successful im
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plementation of user microcontroller applications. By proper consultation of the relevant parts of
this section, users can ensure that they make the most efficient use of the flexible and multi-func
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tion features within the I/O Type microcontroller series.
Introduction
The HT48R10A-1/HT48C10-1, HT48R30A-1/HT48C30-1, HT48R50A-1/HT48C50-1,
HT48R70A-1/HT48C70-1 and HT48RU80/HT48CU80 are 8-bit high performance, RISC architec
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ture microcontroller devices specifically designed for multiple I/O control product applications. De
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vice flexibility is enhanced with their internal special features such as HALT and wake-up
functions, oscillator options, buzzer driver, UART, etc. These features combine to ensure applica-
tions require a minimum of external components and therefore reduce overall product costs. Hav-
ing 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
control, consumer products, subsystem controllers, etc. Many features are common to all devices,
however, they differ in areas such as I/O pin count, RAM and ROM capacity, timer number and
size etc. An additional feature that is incorporated within the HT48RU80/HT48CU80 devices is a
full-duplex asynchronous serial communications UART function.
The HT48R10A-1, HT48R30A-1, HT48R50A-1, HT48R70A-1 and HT48RU80 are OTP devices of
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fering 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 low
cost product development cycles. However, for applications that are at a mature state in their de
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sign process, the HT48C10-1, HT48C30-1, HT48C50-1, HT48C70-1 and HT48CU80 mask ver
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sion devices offer a complementary device for products with high volume and low cost demands.
Fully pin and functionally compatible with their OTP sister 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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