Renesas rl78 User Manual

 

RL78/G1A 

CHAPTER  28   INSTRUCTION  SET 

R01UH0305EJ0200  Rev.2.00 

 

 

830  

Jul 04, 2013 

 

 

This chapter lists the instructions in the RL78 microcontroller instruction set.  For details of each operation and 

operation code, refer to the separate document RL78 Microcontrollers User’s Manual: Software (R01US0015). 
 

 

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.  Alphabetic letters in capitals and the symbols, #, !, !!, $, $!, [ ], and ES: are keywords and 

are described as they are.  Each symbol has the following meaning. 
 

 

•  #: 

Immediate data specification 

 

•  !: 

16-bit absolute address specification 

 

•  !!: 

20-bit absolute address specification 

 

•  $: 

8-bit relative address specification 

 

•  $!:  16-bit relative address specification 

 

•  [ ]:  Indirect address specification 

 

•  ES::  Extension 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 ES: symbols. 

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

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

 

Identifier Description 

Method 

r 

rp 

sfr 

sfrp 

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 (SFR symbol) FFF00H to FFFFFH 

Special-function register symbols (16-bit manipulatable SFR symbol.  Even addresses only

) FFF00H to 

FFFFFH 

saddr 

saddrp 

FFE20H to FFF1FH Immediate data or labels 

FFE20H to FF1FH Immediate data or labels (even addresses only

) 

addr20 

addr16  

addr5  

00000H to FFFFFH Immediate data or labels  

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

) 

0080H to 00BFH 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 

RBn 

RB0 to RB3 

Note  Bit 0 = 0 when an odd address is specified. 

Remark  The special function registers can be described to operand sfr as symbols.  See Table 3-5  SFR List for the 

symbols of the special function registers.  The extended special function registers can be described to 

operand !addr16 as symbols.  See Table 3-6  Extended SFR (2nd SFR) List for the symbols of the extended 

special function registers. 

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