NEC PD78F9488 Manuale Utente

User’s Manual  U15331EJ4V1UD

Target Readers 

This manual is intended for user engineers who wish to understand the functions of 
the 

µ

PD789489 Subseries and design and develop application systems and programs 

for these devices. 
Target products: 

• 

µ

PD789489 Subseries: 

µ

PD789488, 789489, 78F9488, 78F9489 

 
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

PD789489 Subseries:   

 

This manual and the instruction manual (common to the 78K/0S Series). 

 

µ

PD789489 Subseries  

User’s Manual 

 78K/0S 

Series 

User’s Manual 

Instructions 

• Pin functions 
•  Internal block functions 
• Interrupts 
•  Other on-chip peripheral functions 
• Electrical specifications 

• CPU function 
• Instruction set 
• Instruction description 

 
How to Use This Manual 

It is assumed that the readers of this manual have general knowledge of electrical 
engineering, logic circuits, and microcontrollers. 

 

•  To understand the overall functions of the 

µ

PD789489 Subseries 

 

→  Read this manual in the order of the CONTENTS. 

•  How to read register formats 
 

→ The name of a bit whose number is enclosed with <> is reserved in the 

assembler and is defined as an sfr variable by the #pragma sfr directive for the 
C compiler. 

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

→ See APPENDIX C  REGISTER INDEX. 

•  To learn the details of the instruction functions of the 78K/0S series 
 

→ Refer to 78K/0S Series Instructions User’s Manual (U11047E) separately 

available.  

•  To learn about the electrical specifications of the 

µ

PD789489 Subseries 

 

→ Refer  to  CHAPTER 22  ELECTRICAL SPECIFICATIONS (

µ

78F9488, 789489, 78F9489)