Summary of TUSB8041 – Four-Port USB 3.0 Hub
The TUSB8041 is a four-port USB 3.0 hub supporting simultaneous SuperSpeed and lower-speed connections. It features per-port or ganged power switching, over-current protection, and battery charging capabilities including CDP and DCP modes. Configuration options include pin strapping, OTP ROM, I2C EEPROM, and an I2C/SMBus slave interface for customizing PIDs, VIDs, and port settings.
Parts used in the TUSB8041 Hub Project:
- TUSB8041 Four-Port USB 3.0 Hub
- Upstream Port
- Downstream Ports (four ports)
- Per Port Power Switching Mechanism
- Ganged Power Switching Mechanism
- Over-Current Protection Circuitry
- Battery Charging Downstream Port (CDP) Handshaking Support
- Dedicated Charging Port (DCP) Mode
- Pin Strap Configuration
- OTP ROM
- I2C EEPROM
- I2C/SMBus Slave Interface
Description
The TUSB8041 is a four-port USB 3.0 hub. It provides simultaneous SuperSpeed USB and high-speed/full-speed connections on the upstream port and provides SuperSpeed USB, high-speed, full-speed, or low-speed connections on the downstream ports. When the upstream port is connected to an electrical environment that only supports high-speed or full-speed/low-speed connections, SuperSpeed USB connectivity is disabled on the downstream ports. When the upstream port is connected to an electrical environment that only supports full-speed/low-speed connections, SuperSpeed USB and high-speed connectivity are disabled on the downstream ports.
The TUSB8041 supports per port or ganged power switching and over-current protection, and supports battery charging applications.
An individually port power controlled hub switches power on or off to each downstream port as requested by the USB host. Also when an individually port power controlled hub senses an over-current event, only power to the affected downstream port will be switched off.
A ganged hub switches on power to all its downstream ports when power is required to be on for any port. The power to the downstream ports is not switched off unless all ports are in a state that allows power to be removed. Also when a ganged hub senses an over-current event, power to all downstream ports will be switched off.
The TUSB8041 downstream ports provide support for battery charging applications by providing Battery Charging Downstream Port (CDP) handshaking support. It also supports a Dedicated Charging Port (DCP) mode when the upstream port is not connected. The DCP mode supports USB devices which support with the USB Battery Charging and Chinese Telecommunications Industry Standard YD/T 1591-2009. In addition, an automatic mode provides transparent support for BC devices and devices supporting Divider Mode charging solutions when the upstream port unconnected.
The TUSB8041 provides pin strap configuration for some features including battery charging support, and also provides customization though OTP ROM, I2C EEPROM or via an I2C/SMBus slave interface for PID, VID, and custom port and phy configurations. Custom string support is also available when using an I2C EEPROM or the I2C/SMBus slave interface.
For more detail: TUSB8041 – Four-Port USB 3.0 Hub
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What types of USB connections does the TUSB8041 support on downstream ports?
It supports SuperSpeed USB, high-speed, full-speed, or low-speed connections depending on the upstream environment. -
How does the TUSB8041 handle power switching for individual ports?
An individually port power controlled hub switches power on or off to each downstream port as requested by the USB host. -
What happens when a ganged hub senses an over-current event?
Power to all downstream ports will be switched off immediately. -
Does the TUSB8041 support battery charging applications?
Yes, it provides Battery Charging Downstream Port handshaking support and Dedicated Charging Port mode. -
How can users configure PID, VID, and custom port settings?
Users can customize these via OTP ROM, I2C EEPROM, or an I2C/SMBus slave interface. -
What occurs if the upstream port only supports high-speed or full-speed/low-speed connections?
SuperSpeed USB connectivity is disabled on the downstream ports. -
Can the TUSB8041 operate in an automatic mode for unconnected upstream ports?
Yes, an automatic mode provides transparent support for BC devices and Divider Mode charging solutions when the upstream port is unconnected.
