don't trust your eyes (Use the command line, Luke!)

Opening up the EZW3 and looking after the main chips,
here it is, the main IC in all its glory.


Texas Instruments TUSB3210 that's it - written on - but wait... let's just run a command to be sure, a quick "lsusb" show:

"0451:2136 Texas Instruments, Inc."

So we're dealing with a TUSB2136 after all, the ID on the case is deceptive!
Some claims to backup my assumptions, according to Texas' doc here, the TUSB3210 DOES NOT support firmware loading via Device Driver - AND IT'S EXACTLY WHAT THE EZW3 WIN32 DRIVER DOES!).

Documentations, the TUSB2136 page on TI website and especially the Datasheet and the Firmware Debugging Guide.

Interesting specifications of the TUSB2136:

• Fully compliant with the USB release 1.1 specification
• Integrated 8052 microcontroller with:
  • 256 × 8 RAM for internal data
  • 8k × 8 RAM code space available for downloadable firmware from host or I²C port.
    
  • 512 × 8 shared RAM used for data buffers and endpoint descriptor blocks (EDB)
    
  • Four 8052 GPIO ports, port 0, 1, 2 and 3