The maximum cable length supported by the CY7C68013A-128AXC is 3 meters (10 feet) for full-speed devices and 1 meter (3.3 feet) for low-speed devices.
To implement a custom USB device class, you need to develop a custom device class driver and modify the device firmware to support the custom class. You can refer to the Cypress Semiconductor's EZ-USB FX2 Technical Reference Manual for more information.
No, the CY7C68013A-128AXC is not designed to be used as a USB hub. It is a USB microcontroller that can be used to implement a USB device, but it does not have the necessary hardware to support multiple downstream ports.
You can use the Cypress Semiconductor's EZ-USB FX2 Development Kit, which includes a debugger and a programmer, to debug your firmware on the CY7C68013A-128AXC.
The maximum power consumption of the CY7C68013A-128AXC is 500 mA, which is the maximum current that can be drawn from the USB bus.