NEC PD78F9488 Manuale Utente

User’s Manual  U15331EJ4V1UD

This chapter lists the instruction set of the 

µ

PD789489 Subseries.  For details of the operation and machine 

language (instruction code) of each instruction, refer to 78K/0S Series Instructions User’s Manual (U11047E). 
 

Operands are described in the “Operand” column of each instruction in accordance with the description method of 

the instruction operand identifier (refer to the assembler specifications for details).  When there are two or more 
description methods, select one of them.  Uppercase letters and the symbols #, !, $,  and [ ] are keywords and are 
described as they are.  Each symbol has the following meaning.  

 
•  #:  Immediate data specification 

•  $:  Relative address specification 

•  !: 

Absolute address specification  

•  [ ]:  Indirect address specification 

 
In the case of immediate data, describe an appropriate numeric value or a label.  When using a label, be sure to 

describe the #, !, $ and [ ] symbols.  

For operand register identifiers, r and rp, either functional names (X, A, C, etc.) or absolute names (names in 

parenthesis in the table below, R0, R1, R2, etc.) can be used for description.  

 

Identifier Description 

Method 

r 
rp 
sfr 

X (R0), A (R1), C (R2), B (R3), E (R4), D (R5), L (R6), H (R7)  
AX (RP0), BC (RP1), DE (RP2), HL (RP3) 
Special function register symbol 

saddr 
saddrp 

FE20H to FF1FH  Immediate data or labels 
FE20H to FF1FH  Immediate data or labels (even addresses only) 

addr16  
addr5 

0000H to FFFFH  Immediate data or labels (only even addresses for 16-bit data transfer instructions) 
0040H to 007FH  Immediate data or labels (even addresses only) 

word 
byte 
bit 

16-bit immediate data or label  
8-bit immediate data or label  
3-bit immediate data or label 

 
Remark  See Table 3-4 Special Function Registers for symbols of special function registers.