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RL78/G1A CHAPTER 28 INSTRUCTION SET
R01UH0305EJ0200 Rev.2.00 830
Jul 04, 2013
CHAPTER 28 INSTRUCTION SET
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).
28.1 Conventions Used in Operation List
28.1.1 Operand identifiers and specification methods
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.
Table 28-1. Operand Identifiers and Specification Methods
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
Note
) FFF00H to
FFFFFH
saddr
saddrp
FFE20H to FFF1FH Immediate data or labels
FFE20H to FF1FH Immediate data or labels (even addresses only
Note
)
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
Note
)
0080H to 00BFH Immediate data or labels (even addresses only
Note
)
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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