參數(shù)資料
型號(hào)： uPSD3251
廠商： 意法半導(dǎo)體
英文描述： Flash Programmable System Devices with 8032 Microcontroller Core(帶8032微控制器內(nèi)核的Flash可編程系統(tǒng)設(shè)備)
中文描述： 閃存可編程系統(tǒng)設(shè)備與8032微控制器內(nèi)核（帶8032微控制器內(nèi)核的閃存可編程系統(tǒng)設(shè)備）
文件頁(yè)數(shù)： 19/128頁(yè)
文件大小： 1566K
代理商： UPSD3251
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μPSD3251F
Table 4. Arithmetic Instructions
Logical Instructions
Table 5, page 20 shows list of the μPSD3251F de-
vice
’
s logical instructions. The instructions that
perform Boolean operations (AND, OR, Exclusive
OR, NOT) on bytes perform the operation on a bit-
by-bit basis. That is, if the Accumulator contains
00110101B and byte contains 01010011B, then:
ANL A, <byte>
will leave the Accumulator holding 00010001B.
The addressing modes that can be used to access
the <byte> operand are listed in Table 5.
The ANL A, <byte> instruction may take any of the
forms:
ANL A,7FH(direct addressing)
ANL A, @R1 (indirect addressing)
ANL A,R6 (register addressing)
ANL A,#53H (immediate constant)
Note:
Boolean operations can be performed on
any byte in the internal Data Memory space with-
out going through the Accumulator. The XRL
<byte>, #data instruction, for example, offers a
quick and easy way to invert port bits, as in
XRL P1, #0FFH.
If the operation is in response to an interrupt, not
using the Accumulator saves the time and effort to
push it onto the stack in the service routine.
The Rotate instructions (RL A, RLC A, etc.) shift
the Accumulator 1 bit to the left or right. For a left
rotation, the MSB rolls into the LSB position. For a
right rotation, the LSB rolls into the MSB position.
The SWAP A instruction interchanges the high
and low nibbles within the Accumulator. This is a
useful operation in BCD manipulations. For exam-
ple, if the Accumulator contains a binary number
which is known to be less than 100, it can be quick-
ly converted to BCD by the following code:
MOVE B,#10
DIV AB
SWAP A
ADD A,B
Dividing the number by 10 leaves the tens digit in
the low nibble of the Accumulator, and the ones
digit in the B register. The SWAP and ADD instruc-
tions move the tens digit to the high nibble of the
Accumulator, and the ones digit to the low nibble.
Mnemonic
Operation
Addressing Modes
Dir.
Ind.
Reg.
Imm
ADD A,<byte>
A = A + <byte>
X
X
X
X
ADDC A,<byte>
A = A + <byte> + C
X
X
X
X
SUBB A,<byte>
A = A
–
<byte>
–
C
X
X
X
X
INC
A = A + 1
Accumulator only
INC <byte>
<byte> = <byte> + 1
X
X
X
INC DPTR
DPTR = DPTR + 1
Data Pointer only
DEC
A = A
–
1
Accumulator only
DEC <byte>
<byte> = <byte>
–
1
X
X
X
MUL AB
B:A = B x A
Accumulator and B only
DIV AB
A = Int[ A / B ]
B = Mod[ A / B ]
Accumulator and B only
DA A
Decimal Adjust
Accumulator only
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