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參數資料
| 型號： | μPD789012 |
| 廠商： | NEC Corp. |
| 英文描述： | 8 Bit Single Chip Microcontrollers(8位單片微控制器) |
| 中文描述： | 8位單片機微控制器（8位單片微控制器） |
| 文件頁數： | 18/44頁 |
| 文件大?。?/td> | 271K |
| 代理商： | ΜPD789012 |
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μ
PD789011, 789012
18
9. OVERVIEW OF THE INSTRUCTION SET
The instruction set of
μ
PD789011 and 789012 is shown in the table below.
9.1 Legend
9.1.1 Operand identifiers and methods of use
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 keywords and must be
described as they are. Each symbol has the following meaning.
# : Immediate data specification
! : Absolute address specification
$
[ ] : Indirect address specification
: Relative 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 9-1. 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
0000H to FFFFH Immediate data or labels
(Only even addresses in a 16-bit data transfer instructions)
0040H to 007FH Immediate data or labels (even addresses only)
addr5
word
byte
bit
16-bit immediate data or label
8-bit immediate data or label
3-bit immediate data or label
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