参数资料
型号: ST52E430B/D
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, UVPROM, 20 MHz, MICROCONTROLLER, CDIP32
封装: WINDOWED, SHRINK, CERAMIC, DIP-32
文件页数: 35/120页
文件大小: 502K
代理商: ST52E430B/D
21/120
ST52T430/E430
2.5 ARITHMETIC LOGIC UNIT
The 8-bit Arithmetic Logic Unit (ALU) allows to
perform arithmetic calculations and logic
instructions which can be divided into 5 groups:
Load, Arithmetic, Jump, Interrupts and Program
Control instructions (refer to the ST52x430
Assembler Set for further details ).
Load Instructions
Mnemonic
Instruction
Bytes
Cycles
Z
S
C
LDCE
LDCE conf, EPROM
3
14
-
LDCR
LDCR conf, RAM
3
14
-
LDFR
LDFR FUZZY_i, RAM
3
14
-
LDPE
LDPE per, EPROM
3
17
-
LDPR
LDPR reg, RAM
3
14
-
LDRC
LDRC RAM, const
3
14
-
LDRE
LDRE RAMi, EPROMi
3
16
-
LDRE
LDRE (RAMi), (EPROMj)
3
18
-
LDRI
LDRI RAM, inp_reg
3
14
-
LDRR
LDRR RAMi, RAMj
3
16
-
PGSET
PGSET const
2
9
-
Arithmetic Instructions
Mnemonic
Instruction
Bytes
Cycles
Z
S
C
ADD
ADD regi, regj
3
17
I
-
I
ADDO
ADDO regi, regj
3
20
I
AND
AND regi, regj
3
17
I
-
ASL
ASL regi
2
15
I
-
I
ASR
ASR regi
2
15
-
I
DEC
DEC regi
2
15
-
I
DIV
DIV regi, regj
3
26
I
INC
INC regi
2
15
I
-
I
MULT
MULT regi, regj
3
19
I
-
NOT
NOT regi
2
15
I
-
OR
OR regi, regj
3
17
I
-
SUB
SUB regi, regj
3
17
I
-
SUBO
SUBO regi, regj
3
20
I
MIRROR
MIRROR regi
2
15
I
-
Table 2.6. Arithmetic & Logic Instructions Set
The computational time required for each
instruction consists of one clock pulse for each
Cycle plus 3 clock pulses for the decoding phase.
The ALU of the ST52x430 is able to perform
multiplication (MULT) and division (DIV). The
multiplication is performed by using 8 bit operands
storing the result in 2 registers (16 bit values), see
Figure 2.13.
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