• 參數(shù)資料
    型號: M38513M4-XXXFP
    元件分類: 微控制器/微處理器
    英文描述: 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PDSO42
    封裝: 0.450 INCH, 0.80 MM, PLASTIC, SSOP-42
    文件頁數(shù): 11/57頁
    文件大?。?/td> 856K
    代理商: M38513M4-XXXFP
    16
    3851 Group
    (Built-in 16 KB ROM)
    SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
    MITSUBISHI MICROCOMPUTERS
    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.
    (1) Clock Synchronous Serial I/O Mode
    Clock synchronous serial I/O mode can be selected by setting the
    serial I/O mode selection bit of the serial I/O control register (bit 6
    of address 001A16) 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.
    Fig. 14 Block diagram of clock synchronous serial I/O
    Fig. 15 Operation of clock synchronous serial I/O function
    D7
    D0
    D1
    D2
    D3
    D4
    D5
    D6
    D0
    D1
    D2
    D3
    D4
    D5
    D6
    RBF = 1
    TSC = 1
    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 register (address 001816)
    Overrun error (OE)
    detection
    Notes 1: As the transmit interrupt (TI), 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 register 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 SRDY
    1/4
    F/F
    P26/SCLK
    Serial I/O status register
    Serial I/O control register
    P27/SRDY
    P24/RXD
    P25/TXD
    XIN
    Receive buffer register
    Address 001816
    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 001C16
    BRG count source selection bit
    Clock control circuit
    Falling-edge detector
    Transmit buffer register
    Data bus
    Address 001816
    Shift clock
    Transmit shift completion flag (TSC)
    Transmit buffer empty flag (TBE)
    Transmit interrupt request (TI)
    Transmit interrupt source selection bit
    Address 001916
    Data bus
    Address 001A16
    Transmit shift register
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