參數(shù)資料
型號: AT80251G2D-SLSUL
廠商: Atmel
文件頁數(shù): 32/77頁
文件大?。?/td> 0K
描述: IC 8051 MCU ROMLESS 44PLCC
標準包裝: 972
系列: 8x251
核心處理器: C251
芯體尺寸: 8/16-位
速度: 16MHz
連通性: EBI/EMI,I²C,Microwire,SPI,UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 32
程序存儲器類型: ROMless
RAM 容量: 1K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 管件
38
AT/TSC8x251G2D
4135F–8051–11/06
Add 3 if it addresses a Peripheral SFR.
5. If this instruction addresses an I/O Port (Px, x = 0-3), add 3 to the number of states.
Add 5 if it addresses a Peripheral SFR.
6. In internal execution only, add 1 to the number of states of the ‘jump taken’ if the des-
tination address is internal and odd.
Table 31.
Summary of Unconditional Jump Instructions
Notes: 1. A shaded cell denotes an instruction in the C51 Architecture.
2. In internal execution only, add 1 to the number of states if the destination address is
internal and odd.
3. Add 2 to the number of states if the destination address is external.
4. Add 3 to the number of states if the destination address is external.
Absolute jumpAJMP <src>(PC)
← (PC) +2; (PC)10:0 ← src opnd
Extended jumpEJMP <src>(PC)
← (PC) + size (instr); (PC)23:0 ← src opnd
Long jumpLJMP <src>(PC)
← (PC) + size (instr); (PC)15:0 ← src opnd
Short jumpSJMP rel(PC)
← (PC) +2; (PC) ← (PC) +rel
Jump indirectJMP at A +DPTR(PC)23:16 ← FFh; (PC)15:0 ← (A) + (DPTR)
No operationNOP(PC)
← (PC) +1
Mnemonic
<dest>,
<src>
(1)
Comments
Binary Mode
Source Mode
Bytes
States
Bytes
States
AJMP
addr11
Absolute jump
2
3(2)(3)
23(2)(3)
EJMP
addr24
Extended jump
5
6(2)(4)
45(2)(4)
at DRk
Extended jump (indirect)
3
7(2)(4)
26(2)(4)
LJMP
at WRj
Long jump (indirect)
3
6(2)(4)
25(2)(4)
addr16
Long jump (direct address)
3
5(2)(4)
35(2)(4)
SJMP
rel
Short jump (relative address)
2
4(2)(4)
24(2)(4)
JMP
at A +DPTR
Jump indirect relative to the DPTR
1
5(2)(4)
15(2)(4)
NOP
No operation (Jump never)
1
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