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    參數(shù)資料
    型號(hào): AT87251G2D-3CSUM
    廠商: Atmel
    文件頁數(shù): 17/77頁
    文件大?。?/td> 0K
    描述: IC 8051 MCU 32K OTP 24MHZ 40DIP
    標(biāo)準(zhǔn)包裝: 216
    系列: 8x251
    核心處理器: C251
    芯體尺寸: 8/16-位
    速度: 24MHz
    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(chǔ)器容量: 32KB(32K x 8)
    程序存儲(chǔ)器類型: OTP
    RAM 容量: 1K x 8
    電壓 - 電源 (Vcc/Vdd): 4.5 V ~ 5.5 V
    振蕩器型: 內(nèi)部
    工作溫度: -40°C ~ 85°C
    封裝/外殼: 40-DIP(0.600",15.24mm)
    包裝: 管件
    24
    AT/TSC8x251G2D
    4135F–8051–11/06
    Size and Execution Time
    for Instruction Families
    Table 20.
    Summary of Add and Subtract Instructions
    Notes: 1. A shaded cell denotes an instruction in the C51 Architecture.
    2. 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.
    3. If this instruction addresses external memory location, add N+2 to the number of
    states (N: number of wait states).
    AddADD <dest>, <src>dest opnd
    ← dest opnd + src opnd
    SubtractSUB <dest>, <src>dest opnd
    ← dest opnd - src opnd
    Add with CarryADDC <dest>, <src>(A)
    ← (A) + src opnd + (CY)
    Subtract with BorrowSUBB <dest>, <src>(A)
    ← (A) - src opnd - (CY)
    Mnemonic
    <dest>,
    <src>
    (1)
    Comments
    Binary Mode
    Source Mode
    Bytes
    States
    Bytes
    States
    ADD
    A, Rn
    Register to ACC
    1
    2
    A, dir8
    Direct address to ACC
    2
    1(2)
    21(2)
    A, at Ri
    Indirect address to ACC
    1
    2
    3
    A, #data
    Immediate data to ACC
    2
    1
    2
    1
    ADD/SUB
    Rmd, Rms
    Byte register to/from byte register
    3
    2
    1
    WRjd, WRjs
    Word register to/from word register
    3
    2
    DRkd, DRks
    Dword register to/from dword register
    3
    5
    2
    4
    Rm, #data
    Immediate 8-bit data to/from byte
    register
    4
    332
    WRj, #data16
    Immediate 16-bit data to/from word
    register
    5
    443
    DRk,
    #0data16
    16-bit unsigned immediate data
    to/from dword register
    5
    645
    Rm, dir8
    Direct address (on-chip RAM or SFR)
    to/from byte register
    43(2)
    32(2)
    WRj, dir8
    Direct address (on-chip RAM or SFR)
    to/from word register
    4
    433
    Rm, dir16
    Direct address (64K) to/from byte
    register
    53(3)
    42(3)
    WRj, dir16
    Direct address (64K) to/from word
    register
    54(4)
    43(4)
    Rm, at WRj
    Indirect address (64K) to/from byte
    register
    43(3)
    32(3)
    Rm, at DRk
    Indirect address (16M) to/from byte
    register
    44(3)
    33(3)
    ADDC/SU
    BB
    A, Rn
    Register to/from ACC with carry
    1
    2
    A, dir8
    Direct address (on-chip RAM or SFR)
    to/from ACC with carry
    21(2)
    A, at Ri
    Indirect address to/from ACC with
    carry
    1
    223
    A, #data
    Immediate data to/from ACC with
    carry
    2
    121
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