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    參數資料
    型號: PSD9143V20JT
    廠商: 意法半導體
    英文描述: Flash In-System Programmable ISP Peripherals For 8-bit MCUs
    中文描述: Flash在系統(tǒng)可編程ISP的外設的8位微控制器
    文件頁數: 66/110頁
    文件大?。?/td> 1737K
    代理商: PSD9143V20JT
    PSD813F2, PSD833F2, PSD834F2, PSD853F2, PSD854F2
    66/110
    PSD Chip Select Input (CSI, PD2)
    PD2 of Port D can be configured in PSDsoft Ex-
    press as PSD Chip Select Input (CSI). When Low,
    the signal selects and enables the internal Flash
    memory, EEPROM, SRAM, and I/O blocks for
    READ or WRITE operations involving the PSD. A
    High on PSD Chip Select Input (CSI, PD2) dis-
    ables the Flash memory, EEPROM, and SRAM,
    and reduces the PSD power consumption. How-
    ever, the PLD and I/O signals remain operational
    when PSD Chip Select Input (CSI, PD2) is High.
    There may be a timing penalty when using PSD
    Chip Select Input (CSI, PD2) depending on the
    speed grade of the PSD that you are using. See
    the timing parameter t
    SLQV
    in
    Table 61., page 94
    or
    Table 62., page 95
    .
    Input Clock
    The PSD provides the option to turn off CLKIN
    (PD1) to the PLD to save AC power consumption.
    CLKIN (PD1) is an input to the PLD AND Array and
    the Output Macrocells (OMC).
    During Power-down mode, or, if CLKIN (PD1) is
    not being used as part of the PLD logic equation,
    the clock should be disabled to save AC power.
    CLKIN (PD1) is disconnected from the PLD AND
    Array or the Macrocells block by setting Bits 4 or 5
    to a 1 in PMMR0.
    Input Control Signals
    The PSD provides the option to turn off the input
    control signals (CNTL0, CNTL1, CNTL2, Address
    Strobe (ALE/AS, PD0) and DBE) to the PLD to
    save AC power consumption. These control sig-
    nals are inputs to the PLD AND Array. During
    Power-down mode, or, if any of them are not being
    used as part of the PLD logic equation, these con-
    trol signals should be disabled to save AC power.
    They are disconnected from the PLD AND Array
    by setting Bits 2, 3, 4, 5, and 6 to a 1 in PMMR2.
    Table 32. APD Counter Operation
    APD Enable Bit
    ALE PD Polarity
    ALE Level
    APD Counter
    0
    X
    X
    Not Counting
    1
    X
    Pulsing
    Not Counting
    1
    1
    1
    Counting (Generates PDN after 15 Clocks)
    1
    0
    0
    Counting (Generates PDN after 15 Clocks)
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    相關代理商/技術參數
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