ZHCSRO2 February   2023 DS160PR1601

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 and Latchup 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
    9. 6.9 Typical Jitter Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Control and Configuration Interface
      1. 7.3.1 Pin Configurations for Lanes
        1. 7.3.1.1 Five-Level Control Inputs
      2. 7.3.2 SMBUS/I2C Register Control Interface
      3. 7.3.3 SMBus/I 2 C Primary Mode Configuration (EEPROM Self Load)
    4. 7.4 Feature Description
      1. 7.4.1 Linear Equalization
      2. 7.4.2 Flat-Gain
      3. 7.4.3 Analog EyeScan
      4. 7.4.4 Receiver Detect State Machine
      5. 7.4.5 Integrated Capacitors
    5. 7.5 Device Functional Modes
      1. 7.5.1 Active PCIe Mode
      2. 7.5.2 Active Buffer Mode
      3. 7.5.3 Standby Mode
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 PCIe x16 Lane Configuration
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  9. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 接收文档更新通知
    3. 9.3 支持资源
    4. 9.4 Trademarks
    5. 9.5 静电放电警告
    6. 9.6 术语表
  10. 10Mechanical, Packaging, and Orderable Information

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7.3.3 SMBus/I2C Primary Mode Configuration (EEPROM Self Load)

The DS160PR1601 can also be configured by reading from EEPROM. To enter into this mode MODE pin must be set to L1. The EEPROM load operation only happens once after device's initial power-up. If the DS160PR1601 is configured for SMBus primary mode, it will remain in the SMBus IDLE state until the READ_EN_N pin is asserted to LOW. After the READ_EN_N pin is driven LOW, the DS160PR1601 becomes an SMBus primary and attempts to self-configure by reading device settings stored in an external EEPROM (SMBus 8-bit address 0xA0). When the DS160PR1601 has finished reading from the EEPROM successfully, it will drive the ALL_DONE_N pin LOW. SMBus/I2C secondary operation is available in this mode before, during or after EEPROM reading. Note during EEPROM reading if the external SMBus/I2C primary wants to access DS160PR1601 registers it must support arbitration.

When designing a system for using the external EEPROM, the user must follow these specific guidelines:

  • EEPROM size of 2 kb (256 × 8-bit) is recommended.
  • Set MODE = L1, configure for SMBus primary mode
  • The external EEPROM device address byte must be 0xA0 and capable of 400 kHz operation at 3.3 V supply
  • 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 DS160PR1601 Programming Guide for detail register sets and control configuration procedures.