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CHAPTER 17 INSTRUCTION SET
This chapter lists the instruction set of the
μ
PD789830 Subseries. For the details of the operation and machine
language (instruction code) of each instruction, refer to
78K/0S Series User's Manual
Instruction (U11047E)
.
17.1 Operation
17.1.1 Operand identifiers and description methods
Operands are described in "Operand" column of each instruction in accordance with the description method of
the instruction operand identifier (refer to the assembler specifications for detail). When there are two or more
description methods, select one of them. Alphabetic letters in capitals and symbols, #, !, $, and [ ] are key words
and are described 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, 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 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 17-1. Operand Identifiers and Description Methods
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
for symbols of special function registers.