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        參數(shù)資料
        型號: PSD835G3V-A-90J
        廠商: 意法半導(dǎo)體
        英文描述: Configurable Memory System on a Chip for 8-Bit Microcontrollers
        中文描述: 在8片位微控制器可配置存儲系統(tǒng)
        文件頁數(shù): 70/110頁
        文件大?。?/td> 570K
        代理商: PSD835G3V-A-90J
        PSD835G2
        PSD8XX Family
        69
        The
        PSD835G2
        Functional
        Blocks
        (cont.)
        9.5.3 Reset and Power On Requirement
        9.5.3.1 Power On Reset
        Upon power up the PSD835G2 requires a reset pulse of tNLNH-PO (minimum 1 ms) after
        V
        CC
        is steady. During this time period the device loads internal configurations, clears
        some of the registers and sets the Flash into operating mode. After the rising edge of
        reset, the PSD835G2 remains in the reset state for an additional tOPR (maximum 120 ns)
        nanoseconds before the first memory access is allowed.
        The PSD835G2 Flash memory is reset to the read array mode upon power up. The FSi
        and CSBOOTi select signals along with the write strobe signal must be in the false
        state during power-up reset for maximum security of the data contents and to remove
        the possibility of data being written on the first edge of a write strobe signal. Any Flash
        memory write cycle initiation is prevented automatically when V
        CC
        is below VLKO.
        9.5.3.2 Warm Reset
        Once the device is up and running, the device can be reset with a much shorter pulse of
        tNLNH (minimum 150 ns). The same tOPR time is needed before the device is operational
        after warm reset. Figure 31 shows the timing of the power on and warm reset.
        OPERATING LEVEL
        POWER ON RESET
        V
        CC
        RESET
        tNLNH
        PO
        tOPR
        tNLNH-A
        tNLNH
        tOPR
        WARM
        RESET
        Figure 31. Power On and Warm Reset Timing
        9.5.3.3
        I/OPin, Register and PLD Status at Reset
        Table 29 shows the I/O pin, register and PLD status during power on reset, warm reset
        and power down mode. PLD outputs are always valid during warm reset, and they are
        valid in power on reset once the internal PSD configuration bits are loaded. This loading of
        PSD is completed typically long before the V
        CC
        ramps up to operating level. Once the PLD
        is active, the state of the outputs are determined by the equations specified in PSDsoft.
        相關(guān)PDF資料
        PDF描述
        PSD835G3V-A-90JI Configurable Memory System on a Chip for 8-Bit Microcontrollers
        PSD835G3V-A-90M Configurable Memory System on a Chip for 8-Bit Microcontrollers
        PSD835G3V-B-20J Configurable Memory System on a Chip for 8-Bit Microcontrollers
        PSD835G3V-B-20JI Configurable Memory System on a Chip for 8-Bit Microcontrollers
        PSD835G3V-B-20M Configurable Memory System on a Chip for 8-Bit Microcontrollers
        相關(guān)代理商/技術(shù)參數(shù)
        參數(shù)描述
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