參數(shù)資料
型號: μPD789806Y
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(shù): 41/125頁
文件大?。?/td> 366K
代理商: ΜPD789806Y
CHAPTER 4 INSTRUCTION SET
24
4.1 OPERATION
4.1.1 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 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 4-1. 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
Refer to
each product user's manual
for symbols of special function registers.
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