• 參數(shù)資料
    型號: M30201
    廠商: Mitsubishi Electric Corporation
    英文描述: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
    中文描述: 單片16位CMOS微機(jī)
    文件頁數(shù): 82/159頁
    文件大小: 2319K
    代理商: M30201
    Clock synchronous serial I/O mode
    82
    Unde
    deeopmen
    Mitsubishi microcomputers
    M30201 Group
    SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
    Figure 1.75. Typical transmit/receive timings in clock synchronous serial I/O mode
    Example of transmit timing (when internal clock is selected)
    Example of receive timing (when external clock is selected)
    Tc = T
    CLK
    = 2(n + 1) / fi
    fi: frequency of BRG0 count source (f
    1
    , f
    8
    , f
    32
    , fc)
    n: value set to BRG0
    Transfer clock
    Transmit enable
    bit (TE)
    Transmit buffer
    empty flag (Tl)
    CLK0
    TxD0
    Transmit
    register empty
    flag (TXEPT)
    “0”
    “1”
    “0”
    “1”
    “0”
    “1”
    The above timing applies to the following settings:
    Internal clock is selected.
    CLK polarity select bit = “0”.
    Transmit interrupt cause select bit = “0”.
    Transmit interrupt
    request bit (IR)
    “0”
    “1”
    1 / f
    EXT
    Dummy data is set in UART0 transmit buffer register
    Transmit enable
    bit (TE)
    Transmit buffer
    empty flag (Tl)
    CLK0
    RxD0
    Receive complete
    flag (Rl)
    “0”
    “1”
    “0”
    “1”
    “0”
    “1”
    Receive enable
    bit (RE)
    “0”
    “1”
    Receive data is taken in
    Transferred from UART0 transmit buffer register to UART0 transmit register
    Read out from UART0 receive buffer register
    The above timing applies to the following settings:
    External clock is selected.
    CLK polarity select bit = “0”.
    f
    EXT
    : frequency of external clock
    Transferred from UART0 receive register
    to UART0 receive buffer register
    Receive interrupt
    request bit (IR)
    “0”
    “1”
    D
    0
    D
    1
    D
    2
    D
    3
    D
    4
    D
    5
    D
    6
    D
    7
    D
    0
    D
    1
    D
    2
    D
    3
    D
    4
    D
    5
    Shown in ( ) are bit symbols.
    Meet the following conditions are met when the CLK
    input before data reception = “H”
    Transmit enable bit “1”
    Receive enable bit “1”
    Dummy data write to UART0 transmit buffer register
    Shown in ( ) are bit symbols.
    Cleared to “0” when interrupt request is accepted, or cleared by software
    Tc
    T
    CLK
    Stopped pulsing because transfer enable bit = “0”
    Data is set in UART0 transmit buffer
    register
    Transferred from UART0 transmit buffer register to UART0
    transmit register
    Cleared to “0” when interrupt request is accepted, or cleared by software
    D
    0
    D
    1
    D
    2
    D
    3
    D
    4
    D
    5
    D
    6
    D
    7
    D
    0
    D
    1
    D
    2
    D
    3
    D
    4
    D
    5
    D
    6
    D
    7
    D
    0
    D
    1
    D
    2
    D
    3
    D
    4
    D
    5
    D
    6
    D
    7
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