ZHCSKJ6 December   2019 TL16C750E

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     方框图
  4. 4 修订历史记录
  5. 5 说明 （续）
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. Table 1. Absolute Maximum Ratings
    2. 7.1      ESD Ratings
    3. Table 2. Recommended Operating Conditions
    4. Table 3. Thermal Information
    5. Table 4. Electrical Characteristics
    6. Table 5. Timing Requirements
    7. 7.2      Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagrams
    3. 9.3 Feature Description
      1. 9.3.1  UART Modes
      2. 9.3.2  Trigger Levels
      3. 9.3.3  Hardware Flow Control
      4. 9.3.4  Auto-RTS
      5. 9.3.5  Auto-CTS
      6. 9.3.6  Software Flow Control
      7. 9.3.7  Software Flow Control Example
      8. 9.3.8  Reset
      9. 9.3.9  Interrupts
      10. 9.3.10 Interrupt Mode Operation
      11. 9.3.11 Polled Mode Operation
      12. 9.3.12 Break and Timeout Conditions
      13. 9.3.13 Programmable Baud Rate Generator with Fractional Divisor
      14. 9.3.14 Fractional Divisor
    4. 9.4 Device Functional Modes
      1. 9.4.1 Device Interface Mode
        1. 9.4.1.1 IOR Used (MODE = VCC)
        2. 9.4.1.2 IOR Unused (MODE = GND)
      2. 9.4.2 DMA Signaling
        1. 9.4.2.1 Single DMA Transfers (DMA Mode 0 or FIFO Disable)
        2. 9.4.2.2 Block DMA Transfers (DMA Mode 1)
      3. 9.4.3 Sleep Mode
    5. 9.5 Register Maps
      1. 9.5.1  Registers Operations
      2. 9.5.2  Receiver Holding Register (RHR)
      3. 9.5.3  Transmit Holding Register (THR)
      4. 9.5.4  FIFO Control Register (FCR)
      5. 9.5.5  Line Control Register (LCR)
      6. 9.5.6  Line Status Register (LSR)
      7. 9.5.7  Modem Control Register (MCR)
      8. 9.5.8  Modem Status Register (MSR)
      9. 9.5.9  Interrupt Enable Register (IER)
      10. 9.5.10 Interrupt Identification Register (IIR)
      11. 9.5.11 Enhanced Feature Register (EFR)
      12. 9.5.12 Divisor Latches (DLL, DLH, DLF)
      13. 9.5.13 Transmission Control Register (TCR)
      14. 9.5.14 Trigger Level Register (TLR)
      15. 9.5.15 FIFO Ready Register
      16. 9.5.16 Alternate Function Register (AFR)
      17. 9.5.17 RS-485 Mode
      18. 9.5.18 IrDA Overview
      19. 9.5.19 IrDA Encoder Function
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Set the desired baud rate
        2. 10.2.2.2 Reset the fifos
        3. 10.2.2.3 Sending data on the bus
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Examples
  13. 13器件和文档支持
    1. 13.1 文档支持
      1. 13.1.1 相关文档
    2. 13.2 接收文档更新通知
    3. 13.3 支持资源
    4. 13.4 商标
    5. 13.5 静电放电警告
    6. 13.6 Glossary
  14. 14机械、封装和可订购信息

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

9.5.12 Divisor Latches (DLL, DLH, DLF)

Two 8-bit registers store the 16-bit divisor and a 6-bit fractional divisor for generation of the baud clock in the baud rate generator. DLH, stores the most significant part of the divisor. DLL stores the least significant part of the division. DLF stores the fractional value of the divisor as x / 64 where x is the value in DLF.

Table 23. DLF Bit Values

BIT BIT SETTINGS
7 Baud divider bit
0 (default) = Enable divide-by-16 baud divider
1 = Enable divide-by-8 baud divider
6 Reserved
5:0 6 bit fractional divider value (x / 64)

For more information on how to calculate the fractional values, see Fractional Divisor.

DLL, DLH and DLF can only be written to before sleep mode is enabled (that is, before IER[4] is set).
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