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    參數(shù)資料
    型號(hào): ST16C554DIJ68TR-F
    廠商: Exar Corporation
    文件頁數(shù): 15/39頁
    文件大?。?/td> 0K
    描述: IC UART FIFO 16B QUAD 68PLCC
    標(biāo)準(zhǔn)包裝: 250
    特點(diǎn): *
    通道數(shù): 4,QUART
    FIFO's: 16 字節(jié)
    規(guī)程: RS232
    電源電壓: 2.97 V ~ 5.5 V
    帶自動(dòng)流量控制功能:
    帶故障啟動(dòng)位檢測(cè)功能:
    帶調(diào)制解調(diào)器控制功能:
    帶CMOS:
    安裝類型: 表面貼裝
    封裝/外殼: 68-LCC(J 形引線)
    供應(yīng)商設(shè)備封裝: 68-PLCC
    包裝: 帶卷 (TR)
    ST16C554/554D
    22
    2.97V TO 5.5V QUAD UART WITH 16-BYTE FIFO
    REV. 4.0.1
    MCR[3]: INT Output Enable
    Enable or disable INT outputs to become active or in three-state. This function is associated with the INTSEL
    input, see below table for details. This bit is also used to control the OP2# signal during internal loopback
    mode. INTSEL pin must be LOW during 68 mode.
    Logic 0 = INT (A-D) outputs disabled (three state) in the 16 mode (default). During internal loopback mode,
    OP2# is HIGH.
    Logic 1 = INT (A-D) outputs enabled (active) in the 16 mode. During internal loopback mode, OP2# is LOW.
    MCR[4]: Internal Loopback Enable
    Logic 0 = Disable loopback mode (default).
    Logic 1 = Enable local loopback mode, see loopback section and Figure 10.
    MCR[7:5]: Reserved (Default 0)
    4.8
    Line Status Register (LSR) - Read/Write
    This register is writeable but it is not recommended. The LSR provides the status of data transfers between the
    UART and the host. If IER bit-2 is enabled, LSR bit-1 will generate an interrupt immediately and LSR bits 2-4
    will generate an interrupt when a character with an error is in the RHR.
    LSR[0]: Receive Data Ready Indicator
    Logic 0 = No data in receive holding register or FIFO (default).
    Logic 1 = Data has been received and can be read from the receive holding register or RX FIFO.
    LSR[1]: Receiver Overrun Flag
    Logic 0 = No overrun error (default).
    Logic 1 = Overrun error. A data overrun error condition occurred in the receive shift register. This happens
    when additional data arrives while the FIFO is full. In this case the previous data in the receive shift register
    is overwritten. Note that under this condition the data byte in the receive shift register is not transferred into
    the FIFO, therefore the data in the FIFO is not corrupted by the error.
    LSR[2]: Receive Data Parity Error Tag
    Logic 0 = No parity error (default).
    Logic 1 = Parity error. The receive character in RHR does not have correct parity information and is suspect.
    This error is associated with the character available for reading in RHR.
    LSR[3]: Receive Data Framing Error Tag
    Logic 0 = No framing error (default).
    Logic 1 = Framing error. The receive character did not have a valid stop bit(s). This error is associated with
    the character available for reading in RHR.
    TABLE 12: INT OUTPUT MODES
    INTSEL
    PIN
    MCR
    BIT-3
    INT A-D OUTPUTS IN 16 MODE
    0
    Three-State
    0
    1
    Active
    1
    X
    Active
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