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CHAPTER 24
INSTRUCTION SET
User’s Manual U12790EJ2V0UD
24.1 Conventions
24.1.1 Operand identifiers and description method
Operands are written in the “Operand” column of each instruction in accordance with the description of the
instruction operand identifiers (refer to the assembler specifications for details). When there are two or more
descriptions, select one of them. Uppercase letters and the symbols #, !, $, and [ ] are keywords and must be written
as they are. Each symbol has the following meaning.
#:
Immediate data specification
!:
Absolute address specification
$:
Relative address specification
[ ]: Indirect address specification
In the case of immediate data, write an appropriate numeric value or a label. When using a label, be sure to write
the #, !, $, and [ ] symbols.
For the operand register symbols, 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.
Table 24-1. Operand Symbols and Descriptions
Symbol
Description
r
X (R0), A (R1), C (R2), B (R3), E (R4), D (R5), L (R6), H (R7),
rp
AX (RP0), BC (RP1), DE (RP2), HL (RP3)
sfr
Special-function register symbolNote
sfrp
Special-function register symbol (16-bit manipulatable register, even addresses only)Note
saddr
FE20H to FF1FH Immediate data or labels
saddrp
FE20H to FF1FH Immediate data or labels (even addresses only)
addr16
0000H to FFFFH Immediate data or labels
(Only even addresses for 16-bit data transfer instructions)
addr11
0800H to 0FFFH Immediate data or labels
addr5
0040H to 007FH Immediate data or labels (even addresses only)
word
16-bit immediate data or label
byte
8-bit immediate data or label
bit
3-bit immediate data or label
RBn
RB0 to RB3
Note
Addresses from FFD0H to FFDFH cannot be accessed with these operands.
Remark
For special-function register symbols, refer to Table 3-4 Special-Function Register List.