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