ZHCSJZ0 June   2019 TUSB8042A

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     图
  4. 4 修订历史记录
  5. 5 说明 （续）
  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 One Time Programmable (OTP) Configuration
      4. 8.3.4 Clock Generation
      5. 8.3.5 Crystal Requirements
      6. 8.3.6 Input Clock Requirements
      7. 8.3.7 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 6. Bit Descriptions – ROM Signature Register
      3. 8.5.3  Vendor ID LSB Register
        1. Table 7. Bit Descriptions – Vendor ID LSB Register
      4. 8.5.4  Vendor ID MSB Register
        1. Table 8. Bit Descriptions – Vendor ID MSB Register
      5. 8.5.5  Product ID LSB Register
        1. Table 9. Bit Descriptions – Product ID LSB Register
      6. 8.5.6  Product ID MSB Register
        1. Table 10. Bit Descriptions – Product ID MSB Register
      7. 8.5.7  Device Configuration Register
        1. Table 11. Bit Descriptions – Device Configuration Register
      8. 8.5.8  Battery Charging Support Register
        1. Table 12. Bit Descriptions – Battery Charging Support Register
      9. 8.5.9  Device Removable Configuration Register
        1. Table 13. Bit Descriptions – Device Removable Configuration Register
      10. 8.5.10 Port Used Configuration Register
        1. Table 14. Bit Descriptions – Port Used Configuration Register
      11. 8.5.11 Device Configuration Register 2
        1. Table 15. Bit Descriptions – Device Configuration Register 2
      12. 8.5.12 USB 2.0 Port Polarity Control Register
        1. Table 16. Bit Descriptions – USB 2.0 Port Polarity Control Register
      13. 8.5.13 UUID Registers
        1. Table 17. Bit Descriptions – UUID Byte N Register
      14. 8.5.14 Language ID LSB Register
        1. Table 18. Bit Descriptions – Language ID LSB Register
      15. 8.5.15 Language ID MSB Register
        1. Table 19. Bit Descriptions – Language ID MSB Register
      16. 8.5.16 Serial Number String Length Register
        1. Table 20. Bit Descriptions – Serial Number String Length Register
      17. 8.5.17 Manufacturer String Length Register
        1. Table 21. Bit Descriptions – Manufacturer String Length Register
      18. 8.5.18 Product String Length Register
        1. Table 22. Bit Descriptions – Product String Length Register
      19. 8.5.19 Device Configuration Register 3
        1. Table 23. Bit Descriptions – Device Configuration Register 3
      20. 8.5.20 USB 2.0 Only Port Register
        1. Table 24. Bit Descriptions – USB 2.0 Only Port Register
      21. 8.5.21 Serial Number String Registers
        1. Table 25. Bit Descriptions – Serial Number Registers
      22. 8.5.22 Manufacturer String Registers
        1. Table 26. Bit Descriptions – Manufacturer String Registers
      23. 8.5.23 Product String Registers
        1. Table 27. Bit Descriptions – Product String Byte N Register
      24. 8.5.24 Additional Feature Configuration Register
        1. Table 28. Bit Descriptions – Additional Feature Configuration Register
      25. 8.5.25 SMBus Device Status and Command Register
        1. Table 29. Bit Descriptions – SMBus Device Status and Command Register
  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 Clock, Reset, and Misc
          8. 9.2.1.2.8 TUSB8042A Power Implementation
        3. 9.2.1.3 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 TUSB8042A 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. 12器件和文档支持
    1. 12.1 接收文档更新通知
    2. 12.2 社区资源
    3. 12.3 商标
    4. 12.4 静电放电警告
    5. 12.5 Glossary
  13. 13机械、封装和可订购信息

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

8.3.1 Battery Charging Features

The TUSB8042A provides support for USB Battery Charging (BC1.2) and custom charging. Battery charging support may be enabled on a per port basis through the REG_6h(batEn[3:0]) or the BATEN[4:1] pins.

USB Battery charging support includes both Charging Downstream Port (CDP) and Dedicated Charging Port (DCP) modes. The DCP mode is compliant with the Chinese Telecommunications Industry Standard YD/T 1591-2009. CDP is enabled when the upstream port has detected valid VBUS, configured, and host sets port power. When the upstream port is not connected and battery charging support is enabled, the TUSB8042A enables DCP mode once all other battery modes such as ACPx have failed or are disabled.

In addition to USB Battery charging (BC1.2), the TUSB8042A supports custom charging indications: Divider Charging (ACP3, ACP2, ACP1 modes), and Galaxy compatible charging. These custom charging modes are only supported when upstream port is unconnected and AUTOMODE is enabled. AUTOMODE can be enabled either thru AUTOENz pin or from Reg_0Ah bit 1 (autoModeEnz) . When in AUTOMODE and upstream port is disconnected, the port automatically transitions from ACP mode to the DCP mode depending on the portable device connected. The divided mode places a fixed DC voltage on the ports DP and DM signals which allows some devices to identify the capabilities of the charger. The default divider mode indicates support for up to 10W (ACP3). The divider mode can be configured to report a lower-current setting (up to 5 W) through REG_0Ah (HiCurAcpModeEn).

When the upstream port is not connected and battery charging support is enabled for a port, the TUSB8042A drives the port power enable active. If AUTOMODE is disabled, then DCP mode is used. If AUTOMODE is enabled and fully automatic mode is disabled (FullAutoEn bit is cleared (Reg_25h Bit 0) or FULLAUTOz pin = 0), then TUSB8042A starts with highest enabled divider current mode (ACPx). The TUSB8042A remains in highest current mode as long as a pull-up is not detected on DP pin. If an pull-up is detected on DP pin, then TUSB8042A drives the port power enable inactive and switch to Galaxy mode, if enabled, or to DCP mode if Galaxy mode is disabled. The TUSB8042A again drives the port power enable active. The TUSB8042A remains in Galaxy mode as long as no pull-up is detected on DP pin. If an pull-up is detected on DP pin, then TUSB8042A drives the port power enable inactive and transition to DCP mode. The TUSB8042A again drives the port power enable active. In DCP mode, the TUSB8042A looks for a pull-up detected on DP pin or RxVdat. If a pull-up or RxVdat is detected on DP, the TUSB8042A remains in DCP mode. If no pull-up or RxVdat is detected on DP pin after 2 seconds, the TUSB8042A drives the port power enable inactive and transition back to ACPx mode. This sequence repeats until upstream port is connected.

When Automatic mode is enabled and full automatic mode is enabled (FullAutoEn Reg_25h bit 0 is set or FULLAUTOz pin = 1), TUSB8042A performs same sequence described in previous paragraph with the addition of attempting all supported ACPx modes before sequencing to Galaxy Mode (if enabled) or DCP mode.

The supported battery charging modes when TUSB8042A configured for SMBus or external EEPROM is detailed in Battery Charging Modes with SMBus/EEPROM Table.

The supported battery charging modes when TUSB8042A configured for I2C but without an external EEPROM is determined by the sampled state of the pins. These modes are detailed in Battery Charging Modes without EEPROM Table.

Table 1. TUSB8042A Battery Charging Modes with SMBus or I2C EEPROM

batEn[n] Reg_06h Bits 3:0 Upstream VBUS HiCurAcpMode En Reg_0Ah Bit 4 autoModeEnz Reg_0Ah Bit 1 FullAutoEn Reg_25h Bit 0 Galaxy_Enz Reg_25h Bit 1 Battery Charging Mode Port x
(x = n + 1)
0 Don’t Care Don't Care Don’t Care Don't Care Don't Care No Charging support
1 > 4V Don't Care Don't Care Don't Care Don't Care CDP
1 < 4V Don't Care 1 Don't Care Don't Care DCP
1 < 4V Don't Care 0 1 1 AUTOMODE enabled. Sequences through all ACPx modes and DCP
Alternate ACP3, ACP2, ACP1, DCP
1 < 4 V 0 0 0 1 AUTOMODE enabled. Sequences between ACP2 and DCP.
Alternate ACP2, DCP
1 < 4V 1 0 0 1 AUTOMODE enabled. Sequences between ACP3 and DCP.
Alternate ACP3, DCP
1 < 4V Don't Care 0 1 0 AUTOMODE enabled with Galaxy compatible charging support.
Alternate ACP3, ACP2, ACP1, Galaxy, DCP
1 < 4V 0 0 0 0 AUTOMODE enabled with Galaxy compatible charging support.
Alternate ACP2, Galaxy, DCP
1 < 4V 1 0 0 0 AUTOMODE enabled with Galaxy compatible charging support.
Alternate ACP3, Galaxy, DCP

Table 2. TUSB8042A Battery Charging Modes without EEPROM

BATEN[3:0] pins Upstream VBUS AUTOENz pin FULLAUTOz pin Battery Charging Mode Port x
(x = n + 1)
0 Don’t Care Don’t Care Don't Care No Charging support
1 > 4V Don't Care Don't Care CDP
1 < 4V 1 0 DCP
1 < 4V 0 0 AUTOMODE enabled with Galaxy compatible charging support. Sequences through all ACPx modes.
Alternate ACP3, ACP2, ACP1, Galaxy, DCP.
1 < 4V 0 1 AUTOMODE enabled with Galaxy compatible charging support.
Alternate ACP3, Galaxy, DCP
1 < 4V 1 1 AUTOMODE enabled. Sequences through all ACPx modes.
Alternate ACP3, ACP2, ACP1, DCP.