
9
User’s Manual U12790EJ2V0UD
PREFACE
Readers
This manual has been prepared for user engineers who want to understand the
functions of the
PD178078 and 178098A Subseries in order to design and develop
its application systems and programs.
Purpose
This manual is intended to give users an understanding of the functions described
in the Organization below.
Organization
The
PD178078 and 178098A Subseries manual is separated into two parts: this
manual and the instruction edition (common to the 78K/0 Series).
PD178078, 178098A
Subseries
User’s Manual
 Pin functions
 CPU functions
 Internal block functions
 Instruction set
 Interrupts
 Explanation of each instruction
 Other on-chip peripheral functions
 Electrical specifications
How to Read This Manual
It is assumed that readers of this manual have general knowledge in the fields of
electricity, logic circuits, and microcontrollers.
 To understand the functions in general:
→ Read this manual in the order of the contents.
 To know the PD178078, 178098A Subseries instruction functions in detail:
→ Refer to the 78K/0 Series Instruction User’s Manual (U12326E)
 How to interpret the register format:
→ The name is defined as a reserved word in the DF178098 and RA78K0, and
is defined in the header file named sfrbit.h in the CC78K0 of a bit whose number
is in angle brackets (<>).
 To know the electrical specifications of the PD178078, 178098A Subseries:
→ Refer to CHAPTER 25 ELECTRICAL SPECIFICATIONS.
Conventions
Data significance:
Higher digits on the left and lower digits on the right
Active low representation:
xxx (overscore over pin or signal name)
Note:
Footnote for item marked with Note in the text
Caution:
Information requiring particular attention
Remark:
Supplementary information
Numeric representation:
Binary ... xxxx or xxxxB
Decimal ... xxxx
Hexadecimal ... xxxxH
78K/0 Series
Instruction
User’s Manual