ZHCSGQ7C September   2017  – May 2019 TDP142

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      简化电路原理图
      2.      显示屏
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Power Supply Characteristics
    6. 6.6  DC Electrical Characteristics
    7. 6.7  AC Electrical Characteristics
    8. 6.8  Timing Requirements
    9. 6.9  Switching Characteristics
    10. 6.10 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 DisplayPort
      2. 8.3.2 4-level Inputs
      3. 8.3.3 Receiver Linear Equalization
    4. 8.4 Device Functional Modes
      1. 8.4.1 Device Configuration in GPIO Mode
      2. 8.4.2 Device Configuration In I2C Mode
      3. 8.4.3 Linear EQ Configuration
      4. 8.4.4 Operation Timing – Power Up
    5. 8.5 Programming
    6. 8.6 Register Maps
      1. 8.6.1 General Register (address = 0x0A) [reset = 00000001]
        1. Table 6. General Registers
      2. 8.6.2 DisplayPort Control/Status Registers (address = 0x10) [reset = 00000000]
        1. Table 7. DisplayPort Control/Status Registers (0x10)
      3. 8.6.3 DisplayPort Control/Status Registers (address = 0x11) [reset = 00000000]
        1. Table 8. DisplayPort Control/Status Registers (0x11)
      4. 8.6.4 DisplayPort Control/Status Registers (address = 0x12) [reset = 00000000]
        1. Table 9. DisplayPort Control/Status Registers (0x12)
      5. 8.6.5 DisplayPort Control/Status Registers (address = 0x13) [reset = 00000000]
        1. Table 10. DisplayPort Control/Status Registers (0x13)
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Source Application Implementation
        1. 9.2.1.1 Design Requirement
        2. 9.2.1.2 Detail Design Procedure
      2. 9.2.2 Sink Application Implementation
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12器件和文档支持
    1. 12.1 相关链接
    2. 12.2 接收文档更新通知
    3. 12.3 社区资源
    4. 12.4 商标
    5. 12.5 静电放电警告
    6. 12.6 Glossary
  13. 13机械、封装和可订购信息

9.2.1.2 Detail Design Procedure

Designing in the TDP142 requires the following:

  • Determine the loss profile on the DisplayPort input (A) and output (B) channels. See Figure 20 for 6 mil trace insertion loss.
  • Based upon the loss profile, determine the optimal configuration for the TDP142, to pass electrical compliance. DPEQ[1:0] must be set to appropriate value. For this case, 12-in of FR4 trace approximately equates to 8 dB loss at 4.05 GHz. Therefore, DPEQ1 should be tied 20k ohms to ground and DPEQ0 should be tied 1 kΩ to ground.
  • See Figure 18 for information of Source application on using the AC coupling capacitors, control pin resistors, and for recommended decouple capacitors from VCC pins to ground.
    • AUX: AUXP should have a 100 kΩ pull-down resistor and AUXN should have a 100 kΩ pull-up resistor. These 100 kΩ resistors must be on the TDP142 side of the 100 nF capacitors.
    • HPDIN is used to enable or disable DisplayPort functionality for power saving. The HPD signal should be routed to either pin 23 or pin 32 based on the GPIO/I2C mode.

      • Table 12. HPD GPIO/I2C Selection

      MODE HPD
      GPIO (I2C_EN = 0) Pin 32
      I2C (I2C_EN != 0) Pin 23

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    • For the application supporting Dual mode DisplayPort: SNOOPENZ pin must be connected to the CONFIG1 on DisplayPort Receptacle through a buffer like the SN74AHC125. The buffer is needed because the internal pulldown on SNOOPENZ pin is too strong to register a valid VIH when a Dual mode adapter is plugged into the DisplayPort receptacle.
  • Configure the TDP142 using the GPIO terminals or the I2C interface:
    • GPIO – Using the terminals DPEQ0 and DPEQ1.
    • I2C - Refer to the I2C Register Maps and the Programming section for a detail configuration procedures.
  • The thermal pad must be connected to ground.