FIGURE 13. BAUD RA" />
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    1. 參數(shù)資料
      型號: XR20M1280L40-0B-EB
      廠商: Exar Corporation
      文件頁數(shù): 8/63頁
      文件大小: 0K
      描述: EVAL BOARD FOR XR20M1280L40
      產(chǎn)品培訓(xùn)模塊: XR21V141x Full-Speed USB UART Family
      UARTs with Integrated Level Shifters
      標(biāo)準(zhǔn)包裝: 1
      主要目的: 接口,UART
      已用 IC / 零件: XR20M1280L40
      已供物品:
      其它名稱: 1016-1627
      FIGURE 13. BAUD RATE GENERATOR
      XTAL1
      XTAL2
      /
      -
      (default)
      16X or 8X or 4X
      Sampling Rate Clock
      to Transmitter
      Prescaler
      Divide by 1
      Prescaler
      Divide by 4
      MCR Bit 7= 0
      MCR Bit -7=1
      Crystal
      Osc
      Buffer
      DLL
      DLM
      DLD[5:0]
      DLL
      DLM
      DLD[5:0]
      16X or 8X or 4X
      Sampling Rate Clock
      to Receiver
      DLD[7]=0
      DLD[7]=1
      0
      1
      DLD[6]
      TABLE 6: TYPICAL DATA RATES WITH A 24 MHZ CRYSTAL OR EXTERNAL CLOCK AT 16X SAMPLING
      Required Output
      Data Rate
      DIVISOR FOR 16x
      Clock (Decimal)
      DLM PROGRAM
      VALUE (HEX)
      DLL PROGRAM
      VALUE (HEX)
      DLD PROGRAM
      VALUE (HEX)
      DATA ERROR
      RATE (%)
      400
      3750
      E
      A6
      0
      2400
      625
      2
      71
      0
      4800
      312.5
      1
      38
      8
      0
      9600
      156.25
      0
      9C
      4
      0
      10000
      150
      0
      96
      0
      19200
      78.125
      0
      4E
      2
      0
      25000
      60
      0
      3C
      0
      28800
      52.0833
      0
      34
      1
      0.04
      38400
      39.0625
      0
      27
      1
      0
      50000
      30
      0
      1E
      0
      57600
      26.0417
      0
      1A
      0
      0.08
      75000
      20
      0
      14
      0
      100000
      15
      0
      F
      0
      115200
      13.0208
      0
      D
      0
      0.16
      153600
      9.7656
      0
      9
      C
      0.16
      200000
      7.5
      0
      7
      8
      0
      225000
      6.6667
      0
      6
      A
      0.31
      230400
      6.5104
      0
      6
      8
      0.16
      250000
      6
      0
      6
      0
      300000
      5
      0
      5
      0
      400000
      3.75
      0
      3
      C
      0
      460800
      3.2552
      0
      3
      4
      0.16
      500000
      3
      0
      3
      0
      750000
      2
      0
      2
      0
      921600
      1.6276
      0
      1
      A
      0.16
      1000000
      1.5
      0
      1
      8
      0
      XR20M1280
      16
      I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS
      REV. 1.0.0
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