• 參數(shù)資料
    型號(hào): MB90F548GPFV
    廠商: FUJITSU LTD
    元件分類: 微控制器/微處理器
    英文描述: 16-bit Proprietary Microcontroller
    中文描述: 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP100
    封裝: PLASTIC, LQFP-100
    文件頁(yè)數(shù): 19/67頁(yè)
    文件大小: 746K
    代理商: MB90F548GPFV
    MB90540/540G/545/545G Series
    19
    (12) Indeterminate outputs from ports 0 and 1 (MB90F543/F549/V540/V540G only)
    During oscillation setting time of step-down circuit (during a power-on reset) after the power is turned on, the
    outputs from ports 0 and 1 become following state.
    If RST pin is “H”, the outputs become indeterminate.
    If RST pin is “L”, the outputs become high-impedance.
    Pay attention to the port output timing shown as follow.
    Oscillation setting time*
    2
    Power-on reset*
    1
    Period of indeterminated
    V
    CC
    (Power-supply pin)
    PONR (power-on reset) signal
    RST (external asynchronous reset) signal
    RST (internal reset) signal
    Oscillation clock signal
    KA (internal operation clock A) signal
    KB (internal operation clock B) signal
    PORT (port output) signal
    *1 : Power-on reset time : Period of “clock frequency
    ×
    2
    17
    ” (Clock frequency of 16 MHz : 8.19 ms)
    *2 : Oscillation setting time : Period of “clock frequency
    ×
    2
    18
    ” (Clock frequency of 16 MHz : 16.38 ms)
    RST pin is “H”
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