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  • 參數(shù)資料
    型號: MB86960APF-G
    元件分類: 微控制器/微處理器
    英文描述: 2 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP100
    封裝: PLASTIC, QFP-100
    文件頁數(shù): 42/66頁
    文件大?。?/td> 376K
    代理商: MB86960APF-G
    MB86960
    47
    t1
    t3
    t2
    t5
    t4
    t6
    t7
    DREQ
    DACK
    RD or WE
    RDY
    EOP
    Figure 18. Single-Cycle DMA Timing
    TRISTATE
    Table 23. Single-Cycle DMA Timing
    Symbol
    Parameter Description
    Min.
    Max.
    Units
    t1
    DACK low to DREQ low
    0
    21
    ns
    t2
    DACK high to DREQ high
    0
    19
    ns
    t3
    DACK low to RD or WE low
    0
    ns
    t4
    RD or WE high to DACK high
    3
    ns
    t5
    RD or WE low to EOP low
    0
    ns
    t6
    EOP high to DACK high
    3
    ns
    t7
    EOP low pulse width
    10
    ns
    1. An asserted EOP terminates any further DREQ after DACK returns high.
    2. The DMA cycle uses DACK as the chip select. DACK overrides CS and SA3-0 if they are both asserted at the same time, forcing
    selection of the Buffer Memory Port as in a DMA cycle.
    3. For RDY(RDY) timing and SD15-0 timing, see Figure 16, t4-t11, and Figure 17, t4-t9.
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