参数资料
型号: AT80251G2D-SLRUM
厂商: Atmel
文件页数: 19/77页
文件大小: 0K
描述: IC 8051 MCU ROMLESS 44PLCC
标准包装: 500
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: 带卷 (TR)
26
AT/TSC8x251G2D
4135F–8051–11/06
Table 22.
Summary of Compare Instructions
Notes: 1. If this instruction addresses an I/O Port (Px, x = 0-3), add 1 to the number of states.
Add 2 if it addresses a Peripheral SFR.
2. If this instruction addresses external memory location, add N+2 to the number of
states (N: number of wait states).
3. If this instruction addresses external memory location, add 2(N+2) to the number of
states (N: number of wait states).
CompareCMP <dest>, <src>dest opnd - src opnd
Mnemonic
<dest>,
<src>
(2)
Comments
Binary Mode
Source Mode
Bytes
States
Bytes
States
CMP
Rmd, Rms
Register with register
3
2
1
WRjd,
WRjs
Word register with word register
3
2
DRkd,
DRks
Dword register with dword register
3
5
2
4
Rm, #data
Register with immediate data
4
3
2
WRj,
#data16
Word register with immediate 16-bit data
5
4
3
DRk,
#0data16
Dword register with zero-extended 16-bit
immediate data
5
645
DRk,
#1data16
Dword register with one-extended 16-bit
immediate data
5
645
Rm, dir8
Direct address (on-chip RAM or SFR) with
byte register
43(1)
32(1)
WRj, dir8
Direct address (on-chip RAM or SFR) with
word register
4
433
Rm, dir16
Direct address (64K) with byte register
5
3(2)
42(2)
WRj, dir16
Direct address (64K) with word register
5
4(3)
43(3)
Rm, at WRj Indirect address (64K) with byte register
4
3(2)
32(2)
Rm, at DRk Indirect address (16M) with byte register
4
4(2)
33(2)
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