8
User’s Manual U12697EJ3V0UM
INTRODUCTION
Target Readers
This manual is intended for user engineers who wish to understand the functions of the
µ
PD784225 and 784225Y Subseries and design its application systems.
Purpose
This manual describes the hardware functions of the
µ
PD784225 and 784225Y Subseries.
Organization
The
µ
PD784225 and 784225Y Subseries User’s Manual is divided into two parts: Hardware
(this manual) and Instruction.
Hardware
Instruction
Pin functions
CPU functions
Internal block functions
Addressing
Interrupts
Instruction set
Other on-chip peripheral functions
There are cautions associated with using this product.
Be sure to read the cautions in the text of each chapter and summarized at the end
of each chapter.
How to Read This Manual
It is assumed that the readers of this manual have general knowledge about electrical
engineering, logic circuits, and microcontrollers.
•
If there are no particular differences in the function
The
µ
PD784225 in the
µ
PD784225 Subseries is described as the representative mask
ROM version, and the
µ
PD78F4225 is described as the representative flash memory
version.
•
If there are differences in the function
Each product name is presented and described separately.
Since
µ
PD784225 Subseries products are described as representative even this case,
for information on the operation of
µ
PD784225Y Subseries products, read the sections
on the
µ
PD784224Y, 784225Y, and 78F4225Y instead of the
µ
PD784224, 784225, and
78F4225.
