SLLSF92A February   2019  – March 2019 TUSB8044A

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Diagram
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Battery Charging Features
      2. 8.3.2 USB Power Management
      3. 8.3.3 I2C Programming Support Using Internal HID to I2C Interface
        1. 8.3.3.1 SET REPORT (Output)
        2. 8.3.3.2 GET REPORT (Feature)
        3. 8.3.3.3 GET REPORT (Input)
      4. 8.3.4 USB2.0 Billboard
      5. 8.3.5 One Time Programmable (OTP) Configuration
      6. 8.3.6 Clock Generation
      7. 8.3.7 Crystal Requirements
      8. 8.3.8 Input Clock Requirements
      9. 8.3.9 Power-Up and Reset
    4. 8.4 Device Functional Modes
      1. 8.4.1 External Configuration Interface
      2. 8.4.2 I2C EEPROM Operation
      3. 8.4.3 Port Configuration
      4. 8.4.4 SMBus Slave Operation
    5. 8.5 Register Maps
      1. 8.5.1  Configuration Registers
      2. 8.5.2  ROM Signature Register
        1. Table 10. Bit Descriptions – ROM Signature Register
      3. 8.5.3  Vendor ID LSB Register
        1. Table 11. Bit Descriptions – Vendor ID LSB Register
      4. 8.5.4  Vendor ID MSB Register
        1. Table 12. Bit Descriptions – Vendor ID MSB Register
      5. 8.5.5  Product ID LSB Register
        1. Table 13. Bit Descriptions – Product ID LSB Register
      6. 8.5.6  Product ID MSB Register
        1. Table 14. Bit Descriptions – Product ID MSB Register
      7. 8.5.7  Device Configuration Register
        1. Table 15. Bit Descriptions – Device Configuration Register
      8. 8.5.8  Battery Charging Support Register
        1. Table 16. Bit Descriptions – Battery Charging Support Register
      9. 8.5.9  Device Removable Configuration Register
        1. Table 17. Bit Descriptions – Device Removable Configuration Register
      10. 8.5.10 Port Used Configuration Register
        1. Table 18. Bit Descriptions – Port Used Configuration Register
      11. 8.5.11 Device Configuration Register 2
        1. Table 19. Bit Descriptions – Device Configuration Register 2
      12. 8.5.12 USB 2.0 Port Polarity Control Register
        1. Table 20. Bit Descriptions – USB 2.0 Port Polarity Control Register
      13. 8.5.13 Billboard AlternateModeVdo
        1. Table 21. Bit Descriptions – Billboard AlternateModeVdo
      14. 8.5.14 UUID Registers
        1. Table 22. Bit Descriptions – UUID Byte N Register
      15. 8.5.15 Language ID LSB Register
        1. Table 23. Bit Descriptions – Language ID LSB Register
      16. 8.5.16 Language ID MSB Register
        1. Table 24. Bit Descriptions – Language ID MSB Register
      17. 8.5.17 Serial Number String Length Register
        1. Table 25. Bit Descriptions – Serial Number String Length Register
      18. 8.5.18 Manufacturer String Length Register
        1. Table 26. Bit Descriptions – Manufacturer String Length Register
      19. 8.5.19 Product String Length Register
        1. Table 27. Bit Descriptions – Product String Length Register
      20. 8.5.20 Device Configuration Register 3
        1. Table 28. Bit Descriptions – Device Configuration Register 3
      21. 8.5.21 USB 2.0 Only Port Register
        1. Table 29. Bit Descriptions – USB 2.0 Only Port Register
      22. 8.5.22 Billboard SVID LSB
        1. Table 30. Bit Descriptions – Billboard SVID LSB
      23. 8.5.23 Billboard SVID MSB
        1. Table 31. Bit Descriptions – Billboard SVID MSB
      24. 8.5.24 Billboard PID LSB
        1. Table 32. Bit Descriptions – Billboard PID LSB
      25. 8.5.25 Billboard PID MSB
        1. Table 33. Bit Descriptions – Billboard PID MSB
      26. 8.5.26 Billboard Configuration
        1. Table 34. Bit Descriptions – Billboard Configuration.
      27. 8.5.27 Billboard String1 Length
        1. Table 35. Bit Descriptions – Billboard String1 Length.
      28. 8.5.28 Billboard String2 Length
        1. Table 36. Bit Descriptions – Billboard String2 Length.
      29. 8.5.29 Serial Number String Registers
        1. Table 37. Bit Descriptions – Serial Number Registers
      30. 8.5.30 Manufacturer String Registers
        1. Table 38. Bit Descriptions – Manufacturer String Registers
      31. 8.5.31 Product String Registers
        1. Table 39. Bit Descriptions – Product String Byte N Register
      32. 8.5.32 Additional Feature Configuration Register
        1. Table 40. Bit Descriptions – Additional Feature Configuration Register
      33. 8.5.33 SMBus Device Status and Command Register
        1. Table 41. Bit Descriptions – SMBus Device Status and Command Register
      34. 8.5.34 Billboard String1_2
        1. Table 42. Bit Descriptions – Billboard String1_2
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Discrete USB Hub Product
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1  Upstream Port Implementation
          2. 9.2.1.2.2  Downstream Port 1 Implementation
          3. 9.2.1.2.3  Downstream Port 2 Implementation
          4. 9.2.1.2.4  Downstream Port 3 Implementation
          5. 9.2.1.2.5  Downstream Port 4 Implementation
          6. 9.2.1.2.6  VBUS Power Switch Implementation
          7. 9.2.1.2.7  PD Controller and EEPROM Implementation
          8. 9.2.1.2.8  DisplayPort Implementation
          9. 9.2.1.2.9  Clock, Reset, and Misc
          10. 9.2.1.2.10 TUSB8044A Power Implementation
        3. 9.2.1.3 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 TUSB8044A Power Supply
    2. 10.2 Downstream Port Power
    3. 10.3 Ground
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Placement
      2. 11.1.2 Package Specific
      3. 11.1.3 Differential Pairs
    2. 11.2 Layout Examples
      1. 11.2.1 Upstream Port
      2. 11.2.2 Downstream Port
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.3.4 USB2.0 Billboard

Integrated in the TUSB8044A is a USB2.0 Billboard device which complies to the “USB Device Class Definition for Billboard Devices Version 1.21” specification. The billboard device is attached to the highest number downstream port of TUSB8044A USB2.0 hub. The purpose of the billboard is to communicate Alternate Mode status to the host system. The TUSB8044A supports only one Alternate Mode.

There are three pins, typically controlled by a USB Power Deliver (USB PD) controller, used to configure TUSB8044A Billboard functionality: BBEN, BBbmConfigured0, and BBbmConfigured1. The pins are only used when I2C mode is selected. If SMBus mode is selected, then TUSB8044A registers are used instead.

BBEN pin controls whether or not Billboard is presented to the Host system. When BBEN pin is high, the Billboard is presented to the Host system. In SMBus mode, BillboardEN field in the Billboard Configuration register performs this function.

BBbmConfigured[1:0] pins map directly to the bmConfigured fields in the Billboard Capability Descriptor. These two pins must be set to reflect the Alternate Mode status before BBEN is asserted high. If Alternate Mode status changes after BBEN pin is high, BBEN pin must be transitioned low, BBbmConfigured[1:0] pins updated to reflect new status, and then BBEN pin asserted high. For cases in which USB PD controller only has one available GPIO to control TUSB8044A Billboard functionality, BBbmConfigured[1:0] pins should be tied to GND and BBEN pin must be asserted when an Alternate Mode failure occurs. In SMBus mode, bbConfigured and BillboardEn fields located in Billboard Configuration register performs this function.

In I2C mode, the TUSB8044A billboard capability descriptor fields can be changed using an external EEPROM. At power-up, the unique billboard fields from external EEPROM are loaded into TUSB8044A billboard. Fields controlled by EEPROM are described in Table 4. When an EEPROM is not used, the TUSB8044A’s default values as indicated in Table 4 are used.

In SMBus mode, the TUSB8044A billboard capability descriptor fields can be changed by the external SMBus master. The SMBus master can write to String1 starting at address 0x100 and String2 starting at address 0x1F0. Please note if SMBus master writes data to address 0x2F0 through 0x2FF, this will overwrite data at addresses 0x1F0 through 0x1FF.

Table 4. EEPROM Billboard Capability Descriptor Map

SIZE I2C EEPROM ADDRESS TUSB8044A DEFAULT WHEN EEPROM NOT USED DESCRIPTION
4-bytes 0x0F,0x0E, 0x0D, 0x0C 0x00001C45 AlternateModeVdo. dwAlternateModeVdo field for the Billboard Alternate Mode Capability Descriptor.
2-bytes 0x28,0x27 0xFF01 (DisplayPort) SVID.
2-bytes 0x2A,0x29 0x82EE Billboard PID. Billboard and hub will share the same VID.
1-byte 0x2B 0x80 Billboard Configuration. When EEPROM used, this field must be set to 0x80.
1-byte 0x2C 0 = use default string in ROM BBString1Len. # of Unicode characters (2 bytes each) in string 1. BBString1Len size can not exceed 120 characters (240 bytes).
1-byte 0x2D 0 = use default string in ROM BBString2Len. # of Unicode characters (2 bytes each) in string 2. BBString2Len size can not exceed 120 characters (240 bytes).
240 bytes 0x100 http://www.displayport.org String 1. AdditionalInfoURL – required string descriptor providing a URL where the user can go to get more detailed information about the product and the various Alternate Modes it supports.
240 bytes 0x1F0 “DisplayPort” String 2. AlternateModeString – optional string to describe the alternate mode, which may include a URL. From Billboard spec, An example string is DisplayPort to VGA adapter. For further assistance, see http://help.vesa.org/dp-usb-type-c/.

The TUSB8044A supports the Billboard Alternate Mode Capability Descriptor. The dwAlternateModeVdo field in the descriptor defaults to 0x00001C45 to align with DisplayPort Alt mode VDO with capabilities described in Table 5. The default can be changed from OTP or EEPROM/SMbus. All dwAlternateModeVdo bits are accessible from the EEPROM/SMbus but only some of the bits are accessible thru OTP.

Table 5. DisplayPort Capabilities VDO

Bit(s) Default Value Description OTP Configurable
1:0 01b 00b = Reserved
01b = UFP_D capable
10b = DFP_D capable
11b = Both UFP		 Yes
2 1b Supports DP Standard signalling rates No
5:3 000b Reserved No
6 1b 0b = DP Interface presented on USB-C plug
1b = DP Interface presented on USB-C receptacle		 Yes
7 0b 0b = USB 2.0 signalling may be required in DisplayPort configuration
1b = USB 2.0 signally not required in DisplayPort configuration		 Yes
9:8 00b Reserved No
12:10 111b DFP_D pin assignments supported.
000b = DFP_D pin assignments are not supported.
xx1b = Pin Assignment C is supported.
x1xb = Pin Assignment D is supported.
1xxb = Pin Assignment E is supported.		 Yes
17:13 00000b Reserved No
20:18 000b UFP_D pin assignments supported.
000b = UFP_D pin assignments are not supported.
xx1b = Pin Assignment C is supported.
x1xb = Pin Assignment D is supported.
1xxb = Pin Assignment E is supported.		 Yes
31:21 00000000000b Reserved No