
User’s Manual U13952EJ3V1UD
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CHAPTER 20 INSTRUCTION SET
This chapter lists the instruction set of the
PD789407A and 789417A Subseries. For details of the operation and
machine language (instruction code) of each instruction, refer to 78K/0S Series Instructions User’s Manual
(U11047E).
20.1 Operation
20.1.1 Operand identifiers and description methods
Operands are described in the Operands 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
parentheses in the table below, R0, R1, R2, etc.) can be used for description.
Table 20-1. 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 label
FE20H to FF1FH Immediate data or label (even addresses only)
addr16
addr5
0000H to FFFFH Immediate data or label (only even addresses for 16-bit data transfer instructions)
0040H to 007FH Immediate data or label (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 3-3 for symbols of special function registers.