Well, we use MPC5748G with FTDI chip to communicate with PC via USB cable. The MCU rx/tx frames from FTDI chip use FIFO mode via GPIOs. The same design with Infineon chip(160M Hz) and FTDI chip can reach about 2Mbps, while in MPC5748G platform, we can get only about 300kbps。
The test code is attached, please give me some advice about how to improve the performance. Thank you.