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單晶片8051

有沒有人知道8051的port輸出電流是多少

我用的是at89c82

感謝提供答案的人

1 Answer

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  • 2 decades ago
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    不知你說的是哪一個port,所以我就全列出來,詳細資料請參考ATMEL網站

    TA = -40°C to 85°C, VCC = 5.0V ± 20% (unless otherwise noted)

    Symbol Parameter Condition Min Max Units

    VIL Input Low-voltage (Except EA) -0.5 0.2 VCC - 0.1 V

    VIL1 Input Low-voltage (EA) -0.5 0.2 VCC - 0.3 V

    VIH Input High-voltage (Except XTAL1, RST) 0.2 VCC + 0.9 VCC + 0.5 V

    VIH1 Input High-voltage (XTAL1, RST) 0.7 VCC VCC + 0.5 V

    VOL Output Low-voltage(1) (Ports 1,2,3) IOL = 1.6 mA 0.45 V

    VOL1

    Output Low-voltage(1)

    (Port 0, ALE, PSEN)

    IOL = 3.2 mA 0.45 V

    VOH

    Output High-voltage

    (Ports 1,2,3, ALE, PSEN)

    IOH = -60 µA, VCC = 5V ± 10% 2.4 V

    IOH = -25 µA 0.75 VCC V

    IOH = -10 µA 0.9 VCC V

    VOH1

    Output High-voltage

    (Port 0 in External Bus Mode)

    IOH = -800 µA, VCC = 5V ± 10% 2.4 V

    IOH = -300 µA 0.75 VCC V

    IOH = -80 µA 0.9 VCC V

    IIL Logical 0 Input Current (Ports 1,2,3) VIN = 0.45V -50 µA

    ITL

    Logical 1 to 0 Transition Current

    (Ports 1,2,3)

    VIN = 2V, VCC = 5V ± 10% -650 µA

    ILI Input Leakage Current (Port 0, EA) 0.45 < VIN < VCC ±10 µA

    RRST Reset Pull-down Resistor 50 300 KΩ

    CIO Pin Capacitance Test Freq. = 1 MHz, TA = 25°C 10 pF

    ICC

    Power Supply Current

    Active Mode, 12 MHz 20 mA

    Idle Mode, 12 MHz 5 mA

    Power-down Mode(2)

    VCC = 6V 100 µA

    VCC = 3V 40

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