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    參數(shù)資料
    型號: M38000S4-XXXFP
    廠商: Mitsubishi Electric Corporation
    英文描述: 16 Characters x 2 Lines, 5x7 Dot Matrix Character and Cursor
    中文描述: 8位單片機
    文件頁數(shù): 36/173頁
    文件大?。?/td> 4203K
    代理商: M38000S4-XXXFP
    1-22
    3800 GROUP USER’S MANUAL
    Serial I/O
    Serial I/O can be used as either clock synchronous or asynchro-
    nous (UART) serial I/O. A dedicated timer is also provided for
    baud rate generation.
    Clock synchronous serial I/O mode
    Clock synchronous serial I/O mode can be selected by setting the
    mode selection bit of the serial I/O control register to “1”.
    For clock synchronous serial I/O, the transmitter and the receiver
    must use the same clock. If an internal clock is used, transfer is
    started by a write signal to the TB/RB (address 0018
    16
    ).
    Fig. 17 Block diagram of clock synchronous serial I/O
    Fig. 18 Operation of clock synchronous serial I/O function
    FUNCTIONAL DESCRIPTION
    1/4
    X
    IN
    f(X
    IN
    )
    1/4
    F/F
    P4
    6
    /S
    CLK1
    Serial I/O status register
    Serial I/O control register
    P4
    7
    /S
    RDY
    P4
    4
    /R
    X
    D
    P4
    5
    /T
    X
    D
    Receive buffer
    Address 0018
    16
    Receive shift register
    Receive buffer full flag (RBF)
    Receive interrupt request (RI)
    Clock control circuit
    Shift clock
    Serial I/O synchronous
    clock selection bit
    Frequency division ratio 1/(n+1)
    Baud rate generator
    Address 001C
    16
    BRG count source selection bit
    Clock control circuit
    Falling-edge detector
    Transmit buffer
    Data bus
    Address 0018
    16
    Shift clock
    Transmit shift completion flag (TSC)
    Transmit buffer empty flag (TBE)
    Address 0019
    16
    Transmit interrupt request (TI)
    Transmit interrupt source selection bit
    Data bus
    Address 001A
    16
    Transmit shift register
    D
    7
    D
    7
    D
    0
    D
    1
    D
    2
    D
    3
    D
    4
    D
    5
    D
    6
    D
    0
    D
    1
    D
    2
    D
    3
    D
    4
    D
    5
    D
    6
    RBF = 1
    TSC = 1
    Overrun error (OE)
    detection
    TBE = 0
    TBE = 1
    TSC = 0
    Transfer shift clock
    (1/2 to 1/2048 of the internal
    clock, or an external clock)
    Serial output TxD
    Serial input RxD
    Write pulse to receive/transmit
    buffer (address 0018
    16
    )
    Notes 1 :
    The transmit interrupt (TI) can be selected to occur either when the transmit buffer has emptied (TBE=1) or after the
    transmit shift operation has ended (TSC=1), by setting the transmit interrupt source selection bit (TIC) of the serial I/O
    control register.
    2 :
    If data is written to the transmit buffer when TSC=0, the transmit clock is generated continuously and serial data is
    output continuously from the TxD pin.
    3 :
    The receive interrupt (RI) is set when the receive buffer full flag (RBF) becomes “1” .
    Receive enable signal
    S
    RDY
    HARDWARE
    相關(guān)PDF資料
    PDF描述
    M38000S4-XXXFS 16 Characters x 2 Lines, 5x7 Dot Matrix Character and Cursor
    M38000S4-XXXHP 16 Characters x 2 Lines, 5x7 Dot Matrix Character and Cursor
    M38000S4-XXXSP 16 Characters x 2 Lines, 5x7 Dot Matrix Character and Cursor
    M38000S4-XXXSS 16 Characters x 2 Lines, 5x7 Dot Matrix Character and Cursor
    M38000S1-XXXFP 16 Characters x 2 Lines, 5x7 Dot Matrix Character and Cursor
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