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    參數(shù)資料
    型號(hào): 935262104026
    廠商: NXP SEMICONDUCTORS
    元件分類: 微控制器/微處理器
    英文描述: 2 CHANNEL(S), 1M bps, SERIAL COMM CONTROLLER, UUC28
    封裝: DIE IN WAFFLE CARRIER-28
    文件頁數(shù): 14/34頁
    文件大?。?/td> 250K
    代理商: 935262104026
    Philips Semiconductors
    Product specification
    SCC2692
    Dual asynchronous receiver/transmitter (DUART)
    1998 Sep 04
    21
    NOTES:
    1.
    INTRN or OP3-OP7 when used as interrupt outputs.
    2.
    The test for open-drain outputs is intended to guarantee switching of the output transistor. Measurement of this response is referenced from the midpoint of the switching
    signal, VM, to a point 0.5V above VOL. This point represents noise margin that assures true switching has occurred. Beyond this level, the effects of external circuitry and
    test environment are pronounced and can greatly affect the resultant measurement.
    VM
    VOL +0.5V
    VOL
    WRN
    INTERRUPT1
    OUTPUT
    tIR
    VM
    VOL +0.5V
    VOL
    RDN
    INTERRUPT1
    OUTPUT
    tIR
    SD00136
    Figure 6. Interrupt Timing
    X1/CLK
    CTCLK
    RxC
    TxC
    tCLK
    tCTC
    tRx
    tTx
    tCLK
    tCTC
    tRx
    tTx
    +5V
    1K
    X1
    X2
    C1 = C2 = 24pF FOR CL = 20PF
    X1
    X2
    3.6864MHz
    3pF
    4pF
    50 TO
    150 K
    TO INTERNAL CLOCK DRIVERS
    SCC2698B
    NOTE:
    C1 AND C2 SHOULD BE BASED ON MANUFACTURER’S SPECIFICATION. PARASITIC CAPACITANCE SHOULD
    BE INCLUDED WITH C1 AND C2. R1 IS ONLY REQUIRED IF U1 WILL NOT DRIVE TO X1 INPUT LEVELS
    TYPICAL CRYSTAL SPECIFICATION
    FREQUENCY:
    2 – 4MHZ
    LOAD CAPACITANCE (CL):
    12 – 32pF
    TYPE OF OPERATION:
    PARALLEL RESONANT, FUNDAMENTAL MODE
    NC
    R1
    U1
    SD00137
    RESISTOR REQUIRED
    WHEN U1 IS A TTL DEVICE
    Figure 7. Clock Timing
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