Table of Contents
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Target Readers
Purpose
Organization
How to Use This Manual
INTRODUCTION
This manual is intended to give user engineers an understanding of the functions of
the µ PD789426, 789436, 789446, and 789456 Subseries to design and develop its
application systems and programs.
Target products:
• µ PD789426 Subseries:
• µ PD789436 Subseries:
• µ PD789446 Subseries:
• µ PD789456 Subseries:
This manual is designed to deepen your understanding of the following functions
using the following organization.
Two manuals are available for the µ PD789426, 789436, 789446, and 789456
Subseries:
This manual and the instruction manual (common to the 78K/0S Series).
µ PD789426, 789436, 789446,
and 789456 Subseries
User's Manual
• Pin functions
• Internal block functions
• Interrupts
• Other internal peripheral functions
It is assumed that the readers of this manual have general knowledge of electrical
engineering, logic circuits, and microcontrollers.
• To understand the overall functions of the µ PD789426, 789436, 789446, and
789456 Subseries
→ Read this manual in the order of the CONTENTS.
• How to read register formats
→ The name of a bit whose number is enclosed in brackets is reserved for the
assembler and is defined for the C compiler by the header file sfrbit.h.
• To learn the detailed functions of a register whose register name is known
→ See APPENDIX C REGISTER INDEX.
• To learn the details of the instruction functions of the 78K/0S series
→ Refer to 78K/0S Series Instructions User's Manual (U11047E) separately
available.
User's Manual U15075EJ1V0UM00
µ PD789425, 789426
µ PD789435, 789436
µ PD789445, 789446
µ PD789455, 789456
78K/0S Series
User's Manual
Instructions
• CPU function
• Instruction set
• Instruction description
7
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Table of Contents
