UPD780974 데이터 시트보기 (PDF) - NEC => Renesas Technology

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UPD780974

8-Bit Single-Chip Microcontrollers

NEC => Renesas Technology 

INTRODUCTION

Readers

This manual has been prepared for user engineers who want to understand the functions

of the µPD780973 Subseries and design and develop its application systems and

programs.

Purpose

This manual is designed to help users understand the following functions using the

organization below.

Organization

The µPD780973 Subseries manual is separated into two parts: this manual and the

instruction edition (common to the 78K/0 Series).

µPD780973 Subseries

User’s Manual

(This Manual)

78K/0 Series

User’s Manual

Instructions

• Pin functions

• Internal block functions

• Interrupt

• Other on-chip peripheral functions

• CPU functions

• Instruction set

• Explanation of each instruction

How to Read This Manual This manual assumes general knowledge of electric engineering, logic circuits, and

microcontrollers.

• To understand the functions of the µPD780973(A) and 78F0974 in general:

→ Read this manual in the order of the CONTENTS.

• How to read register formats:

→ The name of a bit whose number is enclosed in square is reserved for the RA78K/

0 and is defined for the CC78K/0 by the header file sfrbit.h.

• To learn the detailed functions of a register whose register name is known:

→ Refer to APPENDIX C REGISTER INDEX.

The application examples in this manual are for the “standard” model for general-

purpose electronic systems. If the examples in this manual are to be used for

applications where a quality higher than that of the “special” model is required, study

the quality grade of the respective components and circuits actually used.

Conventions

Data significance

Active low representation

Note

Caution

Remark

Numerical 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

··· ×××× or ××××B

Decimal

··· ××××

Hexadecimal ··· ××××H

8

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