The CY7C63823-QXC supports clock frequencies up to 48 MHz.
The FIFO interface can be configured using the FX2LP's EEPROM or through software using the USB interface. The FIFO interface can be configured as a 16-bit or 32-bit interface, and the FIFO depth can be set to 1KB, 2KB, 4KB, or 8KB.
The maximum data transfer rate of the CY7C63823-QXC is 480 Mbps.
No, the CY7C63823-QXC is a USB 2.0 device and is not compatible with USB 3.0.
Flow control can be implemented using the FX2LP's built-in flow control mechanism, which uses the RTS and CTS signals to control data transmission.