Hi, Currently, I have problem of the UBoot MCC driver. I setup the internal loopback on MPC8568. And here is the data of each channel: Channel # Tx Data Rx Data 0 0x01 0x9D 1 0x02 0xE1 2 0x03 0x9E 3 0x04 0xF1 4 0x05 0x83 ... Any idea on this issue? Or where can I find a working MCC Uboot driver of MPC8568? Thanks for your help, Mike