User’s Manual U12978EJ3V0UD
7
INTRODUCTION
Readers
This manual is intended for users who wish to understand the functions of the
µ
PD789800 Subseries and who design and develop its application systems and
programs.
Target products:
•
µ
PD789800 Subseries:
µ
PD789800 and
µ
PD78F9801
Purpose
This manual is intended to give users an understanding of the functions described in
the
Organization
below.
Organization
Two manuals are available for the
µ
PD789800 Subseries:
This manual and the Instruction Manual (common to the 78K/0S Series).
µ
PD789800 Subseries
User’s Manual
78K/0S Series
User’s Manual
Instruction
•
Pin functions
•
Internal block functions
•
Interrupts
•
Other internal peripheral functions
•
Electrical specifications
•
CPU function
•
Instruction set
•
Instruction description
How to Read This Manual
It is assumed that the readers of this manual have general knowledge in the fields of
electrical engineering, logic circuits, and microcontrollers.
•
To understand the overall functions of the
µ
PD789800 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 angle brackets (< >) is reserved
in the assembler and is defined in the C compiler by the header file sfrbit.h.
•
To learn the detailed functions of a register whose register name is known
→
See
APPENDIX B REGISTER INDEX
.
•
To learn details of the instruction functions of the 78K/0S Series
→
Refer to
78K/0S Series Instruction User’s Manual (U11047E)
separately
available.
•
To know the electrical specifications of the
µ
PD789800 Subseries
→
Refer to
CHAPTER 16 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
Numerical representation:
Binary ... xxxx or xxxxB
Decimal ... xxxx
Hexadecimal ... xxxxH