ZHCSMH6 February   2021 DS160PR421

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Pin Configuration and 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 DC Electrical Characteristics
    6. 6.6 High Speed Electrical Characteristics
    7. 6.7 SMBUS/I2C Timing Charateristics
    8. 6.8 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Linear Equalization
      2. 7.3.2 Flat Gain
      3. 7.3.3 Receiver Detect State Machine
    4. 7.4 Device Functional Modes
      1. 7.4.1 Active PCIe Mode
      2. 7.4.2 Active Buffer Mode
      3. 7.4.3 Standby Mode
    5. 7.5 Programming
      1. 7.5.1 Control and Configuration Interface
        1. 7.5.1.1 Pin Mode
          1. 7.5.1.1.1 Four-Level Control Inputs
        2. 7.5.1.2 SMBUS/I2C Register Control Interface
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 PCIe x8 Lane Switching
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Pin-to-pin Passive versus Redriver Option
        4. 8.2.1.4 Application Curves
      2. 8.2.2 DisplayPort Application
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
  11. 11Layout Example
  12. 12Device and Documentation Support
    1. 12.1 接收文档更新通知
    2. 12.2 支持资源
    3. 12.3 Trademarks
    4. 12.4 静电放电警告
    5. 12.5 术语表
  13. 13Mechanical, Packaging, and Orderable Information

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7.5.1.2 SMBUS/I2C Register Control Interface

If MODE = L2 (SMBus / I2C slave control mode), the DS160PR421 is configured for best signal integrity through a standard I2C or SMBus interface that may operate up to 400 kHz. The slave address of the DS160PR421 is determined by the pin strap settings on the ADDR and MODE pins. The eight possible slave addresses (7-bit) for each channel banks of the device are shown in #GUID-E9340771-C236-4FA1-9858-12F9C1258CFE/T5706319-19. In SMBus/I2C modes the SCL, SDA pins must be pulled up to a 3.3 V supply with a pull-up resistor. The value of the resistor depends on total bus capacitance. 4.7 kΩ is a good first approximation for a bus capacitance of 10 pF.

Refer to the DS160PR412/421 Programming Guide for details.

Table 7-4 SMBUS/I2C Slave Address Settings
MODE ADDR 7-bit Slave Address Channels 0-1 7-bit Slave Address Channels 2-3
L1 L0 0x18 0x19
L1 L1 0x1A 0x1B
L1 L2 0x1C 0x1D
L1 L3 0x1E 0x1F
L2 L0 0x20 0x21
L2 L1 0x22 0x23
L2 L2 0x24 0x25
L2 L3 0x26 0x27
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