
7
User’s Manual U15017EJ2V0UD
INTRODUCTION
Target Readers
This manual is intended for users who wish to understand the functions of the
μ
PD784976A
Subseries and to design and develop application systems and programs using these microcontrollers.
Purpose
This manual is intended for users to understand the functions described in the Organization below.
Organization
The
μ
PD784976A Subseries User’s Manual is divided into two parts: this manual and Instructions
(common to the 78K/IV Series)
μ
PD784976A Subseries
User’s Manual
(This manual)
78K/IV Series
User’s Manual
Instructions
Pin functions
Internal block functions
Interrupt functions
Other on-chip peripheral functions
Electrical specifications
CPU functions
Instruction set
Explanation of each instruction
How to Read This Manual
It is assumed that the reader of this manual has general knowledge in the fields of electrical
engineering, logic circuits, and microcontrollers.
To understand the functions in general:
→
Read this manual in the order of the contents.
How to interpret the register format:
→
For the bit whose number is in angle brackets, its bit name is defined as a reserved word
in the RA78K4, and in CC78K4, already defined in the header file named sfrbit.h.
When you know a register name and want to confirm its details:
→
Read
APPENDIX C REGISTER INDEX
.
To know the
μ
PD784976A Subseries instruction function in details:
→
Refer to
78K/IV Series User’s Manual: Instruction (U10905E)
separately available.
When you want to know the application examples of each function of the
μ
PD784976A Subseries
→
Refer to
78K/IV Series Software Basics (U10095E)
separately available.
To learn about the electrical specifications:
→
Refer to
CHAPTER 21 ELECTRICAL SPECIFICATIONS
.
Conventions
Data significance:
Active low representation:
Note
:
Caution
:
Remark
:
Numeral representation:
Higher digits on the left and lower digits on the right
×××
(overscore over pin or signal name)
Footnote for item marked with
Note
in the text
Information requiring particular attention
Supplementary information
Binary.................. XXXX or XXXXB
Decimal ............... XXXX
Hexadecimal ....... XXXXH