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  • 參數(shù)資料
    型號(hào): MC68SZ328
    廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
    英文描述: i.MX Integrated Portable System Processor
    中文描述: i.MX處理器集成的便攜式系統(tǒng)
    文件頁數(shù): 25/96頁
    文件大?。?/td> 1495K
    代理商: MC68SZ328
    Specifications
    MC9328MX1 Advance Information, Rev. 4
    Freescale Semiconductor
    25
    3.9.2.2 DTACK Read Cycle DMA Enabled
    Figure 7. DTACK Read Cycle DMA Enabled
    5
    DTACK
    asserted to OE negated
    3T+2.2
    4T+6.86
    ns
    6
    Data hold timing after OE negated
    0
    ns
    7
    Data ready after DTACK
    asserted
    0
    T
    ns
    8
    OE negated to CS negated
    0.5T+0.24
    0.5T+0.67
    ns
    9
    OE negated after EB negated
    0.5
    1.5
    ns
    10
    DTACK
    pulse width
    1T
    3T
    ns
    Note
    :
    0. DTACK assert means DTACK become low level.
    1. T is the system clock period. (For 96MHz system clock)
    2. OE and EB assertion time is programmable by OEA bit in CS5L register. EB
    assertion in read cycle will occur
    only when EBC bit in CS5L register is clear.
    3. Address becomes valid and CS asserts at the start of read access cycle.
    4. The external DTACK input requirement is eliminated when CS5 is programmed to use internal wait state.
    Table 14. Parameters for Read Cycle, WSC = 111111, DTACK_SEL=0, HKCL=96MHz (Continued)
    Number
    Characteristic
    (3.0 ± 0.3) V
    Unit
    Minimum
    Maximum
    RW
    DTACK
    Address
    EB
    CS5
    OE
    (logic high)
    Databus
    input to MX1)
    programmable
    min 0ns
    (1)
    (6)
    (7)
    (3)
    (4)
    (2)
    (5)
    (8)
    (9)
    (10)
    (11)
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