SLLSFB2A April   2020  – June 2026 TUSB1146

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4  TUSB1146 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  Recommended Operating Conditions
    4. 5.4  Thermal Information
    5. 5.5  Power Supply Characteristics
    6. 5.6  Control I/O DC Electrical Characteristics
    7. 5.7  USB and DP Electrical Characteristics
    8. 5.8  DCI Electrical Characteristics
    9. 5.9  Timing Requirements
    10. 5.10 Switching Characteristics
    11. 5.11 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 USB 3.1
      2. 7.3.2 DisplayPort
      3. 7.3.3 4-level Inputs
      4. 7.3.4 Receiver Linear Equalization
    4. 7.4 Device Functional Modes
      1. 7.4.1 Device Configuration in GPIO Mode
      2. 7.4.2 Device Configuration In I2C Mode
      3. 7.4.3 DisplayPort Mode
      4. 7.4.4 Linear EQ Configuration
      5. 7.4.5 VOD modes
        1. 7.4.5.1 Linearity VOD
        2. 7.4.5.2 Limited VOD
      6. 7.4.6 Transmit Equalization
      7. 7.4.7 USB3.1 Modes
      8. 7.4.8 Downstream Facing Port Adaptive Equalization
        1. 7.4.8.1 Fast Adaptive Equalization in I2C Mode
        2. 7.4.8.2 Full Adaptive Equalization
    5. 7.5 Programming
      1. 7.5.1 Transition between Modes
      2. 7.5.2 Pseudocode Examples
        1. 7.5.2.1 Fast AEQ with linear redriver mode
        2. 7.5.2.2 Fast AEQ with limited redriver mode
        3. 7.5.2.3 Full AEQ with linear redriver mode
        4. 7.5.2.4 Full AEQ with limited redriver mode
      3. 7.5.3 TUSB1146 I2C Address Options
      4. 7.5.4 TUSB1146 I2C Slave Behavior
  9. 8 Registers
    1. 8.1 Register Maps
      1. 8.1.1 TUSB1146 Registers
        1. 8.1.1.1  General_1 Register (Offset = 0xA) [reset = 0x1]
        2. 8.1.1.2  DCI_TXEQ_CTRL Register (Offset = 0xB) [reset = 0x6C]
        3. 8.1.1.3  DP01EQ_SEL Register (Offset = 0x10) [reset = 0x0]
        4. 8.1.1.4  DP23EQ_SEL Register (Offset = 0x11) [reset = 0x0]
        5. 8.1.1.5  DisplayPort_1 Register (Offset = 0x12) [reset = 0x0]
        6. 8.1.1.6  DisplayPort_2 Register (Offset = 0x13) [reset = 0x0]
        7. 8.1.1.7  AEQ_CONTROL1 Register (Offset = 0x1C) [reset = 0xF0]
        8. 8.1.1.8  AEQ_CONTROL2 Register (Offset = 0x1D) [reset = 0x20]
        9. 8.1.1.9  AEQ_LONG Register (Offset = 0x1E) [reset = 0x77]
        10. 8.1.1.10 USBC_EQ Register (Offset = 0x20) [reset = 0x0]
        11. 8.1.1.11 SS_EQ Register (Offset = 0x21) [reset = 0x0]
        12. 8.1.1.12 USB3_MISC Register (Offset = 0x22) [reset = 0x44]
        13. 8.1.1.13 USB_STATUS Register (Offset = 0x24) [reset = 0x41]
        14. 8.1.1.14 VOD_CTRL Register (Offset = 0x32) [reset = 0x40]
        15. 8.1.1.15 AEQ_STATUS Register (Offset = 0x3B) [reset = 0x0]
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 USB and DP Upstream Facing Port (USB Host / DP GPU to USB-C receptacle) Configuration
        2. 9.2.2.2 USB Downstream Facing Port (USB-C receptacle to USB Host) Configuration
          1. 9.2.2.2.1 Fixed Equalization
          2. 9.2.2.2.2 Fast Adaptive Equalization
          3. 9.2.2.2.3 Full Adaptive Equalization
      3. 9.2.3 Application Curve
    3. 9.3 System Examples
      1. 9.3.1 USB 3.1 Only
      2. 9.3.2 USB 3.1 and 2 Lanes of DisplayPort
      3. 9.3.3 DisplayPort Only
  11. 10Power Supply Recommendations
  12. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  13. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Support Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  14. 13Revision History
  15. 14Mechanical, Packaging, and Orderable Information

8.1.1.6 DisplayPort_2 Register (Offset = 0x13) [reset = 0x0]

DisplayPort_2 is shown in Table 8-8.

Return to the Summary Table.

This register provides controls for enabling and disabling AUX snooping and individual DP lanes.

Table 8-8 DisplayPort_2 Register Field Descriptions
Bit Field Type Reset Description
7 AUX_SNOOP_DISABLE R/W 0x0

Controls whether DP lanes are enabled based on AUX snooped value or registers.

0x0 = AUX snoop enabled.

0x1 = AUX snoop disabled. DP lanes are controlled by registers.
6 RESERVED R 0x0

Reserved
5-4 AUX_SBU_OVR R/W 0x0

This field overrides the AUXP/N to SBU1/2 connect and disconnect based on CTL1 and FLIP. Changing this field to 01b or 10b will allow traffic to pass through AUX to SBU regardless of the state of CTLSEL1 and FLIPSEL register.

0x0 = AUX to SBU connection determined by CTLSEL1 and FLIPSEL

0x1 = AUXP -> SBU1 and AUXN -> SBU2

0x2 = AUXP -> SBU2 and AUXN -> SBU1

0x3 = AUX to SBU open.
3 DP3_DISABLE R/W 0x0

When AUX_SNOOP_DISABLE = 1b, this field can be used to enable or disable DP lane 3. When AUX_SNOOP_DISABLE = 0b, changes to this field will have no effect on lane 3 functionality.

0x0 = DP Lane 3 enabled.

0x1 = DP Lane 3 disabled.
2 DP2_DISABLE R/W 0x0

When AUX_SNOOP_DISABLE = 1b, this field can be used to enable or disable DP lane 2. When AUX_SNOOP_DISABLE = 0b, changes to this field will have no effect on lane 2 functionality.

0x0 = DP Lane 2 enabled.

0x1 = DP Lane 2 disabled.
1 DP1_DISABLE R/W 0x0

When AUX_SNOOP_DISABLE = 1b, this field can be used to enable or disable DP lane 1. When AUX_SNOOP_DISABLE = 0b, changes to this field will have no effect on lane 1 functionality.

0x0 = DP Lane 1 enabled.

0x1 = DP Lane 1 disabled.
0 DP0_DISABLE R/W 0x0

When AUX_SNOOP_DISABLE = 1b, this field can be used to enable or disable DP lane 0. When AUX_SNOOP_DISABLE = 0b, changes to this field will have no effect on lane 0 functionality.

0x0 = DP Lane 0 enabled.

0x1 = DP Lane 0 disabled.