Rev. 1.0, 03/99, page v of 209
Preface
The HMCS43XX family is a family of 4-bit microcomputers built around the HMCS400 CPU and
including standard peripheral functions such as A/D converters with a variety of A/D input
channels, serial interfaces, and multifunction timers. The architecture of the powerful HMCS400
CPU core is known for its ease of programming.
The peripheral functions of the HMCS43XX have been developed as standalone modules and a
modular architecture employed in which the respective modules are connected via a standardized
interface.
The HD404889 Series are also 4-bit microcomputers also built around the powerful HMCS400
CPU core with its excellent ease of programming, and including various peripheral functions such
as LCD circuit, A/D converters, and multifunction timers. The microcomputers in this series are
ideally suited to display panel control and system control in a wide range of applications,
primarily audio-visual equipment such as radiocassette sets with built-in CD players, as well as
home appliances such as electronic jars, and telephones and pagers.
The peripheral functions of the HM404889 Series have been developed as standalone modules and
a modular architecture employed in which the respective modules are connected via a standardized
interface.
The “Applications” volume of the HMCS400 Series Application Notes is a collection of examples
of combinations of the built-in peripherals in the HMCS400 Series of microcomputers. This
collection is intended as a reference for software and hardware designers.
The operation of the programs and circuits, etc., described in these application notes has
been checked. However, please be sure to confirm their operation before actually using them
in any application.