ZHCSQH7D November   2021  – April 2024 TUSB2E11

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Device Version Comparison
    1. 4.1 Device Variants
  6. 5 Pin Configuration and Functions
  7. 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 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Timing Requirements
    8. 6.8 Typical Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
    4. 8.4 Device Functional Modes
      1. 8.4.1  Repeater Mode
      2. 8.4.2  Power Down Mode
      3. 8.4.3  Disabled Mode
      4. 8.4.4  UART Mode
      5. 8.4.5  Auto-Resume ECR
      6. 8.4.6  L2 State Interrupt Modes
      7. 8.4.7  Attach Detect Interrupt Mode
      8. 8.4.8  GPIO Mode
      9. 8.4.9  USB 2.0 High-Speed HOST Disconnect Detection
      10. 8.4.10 Frame Based Low Power Mode
      11. 8.4.11 Battery Charging
    5. 8.5 Manufacturing Test Modes
      1. 8.5.1 USB DP Test Procedure
      2. 8.5.2 USB DM Test Procedure
    6. 8.6 I2C Target Interface
  10. 9 Register Access Protocol (RAP)
  11. 10Register Map
    1. 10.1 TUSB2E11 Registers
  12. 11Application and Implementation
    1. 11.1 Application Information
    2. 11.2 Typical Application
      1. 11.2.1 Design Requirements
      2. 11.2.2 Detailed Design Procedure
      3. 11.2.3 Application Curves
    3. 11.3 Power Supply Recommendations
      1. 11.3.1 Power Up Reset
    4. 11.4 Layout
      1. 11.4.1 Layout Guidelines
      2. 11.4.2 Example Layout for Application with 1.8V I2C Variant
  13. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 第三方产品免责声明
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 接收文档更新通知
    4. 12.4 支持资源
    5. 12.5 Trademarks
    6. 12.6 静电放电警告
    7. 12.7 术语表
  14. 13Revision History
  15. 14Mechanical, Packaging, and Orderable Information

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8.4.10 Frame Based Low Power Mode

The USB2.0 standard defines high-speed microframes that occur every 125μs. Using a patented design, the TUSB2E11 monitors idle conditions within every high-speed microframe. The TUSB2E11 will enter a low power state if the bus is idle for greater than FRAME_LP_OFF_THRESHOLD and will remain in the low power state until the start of the next μSOF. This feature is enabled by default and can be disabled by clearing HOST_FRAME_LP_EN or DEVICE_FRAME_LP_EN bits.

Table 8-3 shows an example of the typical high-speed idle power the TUSB2E11 consumes based on the value of the FRAME_LP_OFF_THRESHOLD and whether or not the frame base low power is enabled. These results assume the TUSB2E11 is in host repeater mode.

Table 8-3 Typical High-Speed Idle Power for Frame Base LP Mode
HOST_FRAME_LP_EN FRAME_LP_OFF_THRESHOLD 1.8V current (mA) 3.3V current (mA)
0 (Disabled) N/A 56 2.8
1 (Enabled) 0x0 (1/32) 11 2.0
1 (Enabled) 0x1 (1/16) 12 2.0
1 (Enabled) 0x2 (1/8) 15 2.1
1 (Enabled) 0x3 (1/4) 22 2.2

Note: Frame based low power mode is enabled by default. If using TUSB2E11 in pin-strap mode, this feature can not be disabled. Contact support if a device variant with frame based low power mode disabled in pin-strap mode is needed.