参数资料
型号: AT80251G2D-SLSUM
厂商: Atmel
文件页数: 22/77页
文件大小: 0K
描述: IC 8051 MCU ROMLESS 44PLCC
标准包装: 972
系列: 8x251
核心处理器: C251
芯体尺寸: 8/16-位
速度: 24MHz
连通性: EBI/EMI,I²C,Microwire,SPI,UART/USART
外围设备: POR,PWM,WDT
输入/输出数: 32
程序存储器类型: ROMless
RAM 容量: 1K x 8
电压 - 电源 (Vcc/Vdd): 4.5 V ~ 5.5 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 44-LCC(J 形引线)
包装: 管件
29
AT/TSC8x251G2D
4135F–8051–11/06
Table 24.
Summary of Multiply, Divide and Decimal-adjust Instructions
Note:
1. A shaded cell denotes an instruction in the C51 Architecture.
MultiplyMUL AB(B:A)
← (A)×(B)
MUL <dest>, <src>extended dest opnd
← dest opnd × src opnd
DivideDIV AB(A)
← Quotient ((A) (B))
(B)
← Remainder ((A) (B))
DivideDIV <dest>, <src>ext. dest opnd high
← Quotient (dest opnd src opnd)
ext. dest opnd low
← Remainder (dest opnd src opnd)
Decimal-adjust ACCDA AIF [[(A)3:0 > 9] ∨ [(AC) = 1]]
for Addition (BCD)
THEN (A)3:0 ← (A)3:0 + 6 !affects CY;
IF [[(A)7:4 > 9] ∨ [(CY) = 1]]
THEN (A)7:4 ← (A)7:4 + 6
Mnemonic
<dest>,
<src>
(1)
Comments
Binary Mode
Source Mode
Bytes
States
Bytes
States
MUL
AB
Multiply A and B
1
5
1
5
Rmd, Rms
Multiply byte register and byte register
3
6
2
5
WRjd, WRjs Multiply word register and word register
3
12
2
11
DIV
AB
Divide A and B
1
10
1
10
Rmd, Rms
Divide byte register and byte register
3
11
2
10
WRjd, WRjs Divide word register and word register
3
21
2
20
DA
A
Decimal adjust ACC
1
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