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STC89C53RC датащи(PDF) 140 Page - STCmicro Technology Co,.Ltd

номер детали STC89C53RC
подробное описание детали  Enhanced 80C51 Central Processing Unit ,6T or 12T per machine cycle
PDF  165 Pages
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производитель  STC [STCmicro Technology Co,.Ltd]
домашняя страница  http://www.stcmicro.com/
Logo STC - STCmicro Technology Co,.Ltd

STC89C53RC датащи(HTML) 140 Page - STCmicro Technology Co,.Ltd

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The operation is applied on the corresponding bits in each operand. The operator must be separated from the
operands by space or tab characters. For example, the following two instructions are the same:
MOV
A, # '9' AND 0FH
MOV
A, #9
The NOT operator only takes one operand. The following three MOV instructions are the same:
THREE
EQU
3
MINUS_THREE EQU
-3
MOV
A, # (NOT THREE) + 1
MOV
A, #MINUS_THREE
MOV
A, #11111101B
Special Operators
The sepcial operators are
SHR
shift right
SHL
shift left
HIGH
high-byte
LOW
low-byte
()
evaluate first
For example, the following two instructions are the same:
MOV
A, #8 SHL 1
MOV
A, #10H
The following two instructions are also the same:
MOV
A, #HIGH 1234H
MOV
A, #12H
Relational Operators
When a relational operator is used between two operands, the result is alwalys false (0000H) or true (FFFFH).
The operators are
EQ
=
equals
NE
< >
not equals
LT
<
less than
LE
<=
less than or equal to
GT
>
greater than
GE
>=
greater than or equal to
Note that for each operator, two forms are acceptable (e.g., "EQ" or "="). In the following examples, all relational
tests are "true":
MOV
A, #5 = 5
MOV
A,#5 NE 4
MOV
A,# 'X' LT 'Z'
MOV
A,# 'X' >= 'X'
MOV
A,#$ > 0
MOV
A,#100 GE 50
140



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