Last years we have used RCM6700 successfully in couple of our projects.
Now we have two new projects in which we will use RCM6700.
But the first samples of the two boards have problems uploading firmware through the programming port.
The difference between the new and the old boards is the USB chip.
The new boards are using FT231XQ, and the old - FT232RL.
We have tried to program RCM6700 with all speeds and options from the RFU interface, but without success.
With DC 10.70 it is possible to program RCM6700, but only when “Max Download Baud Rate” is set to 57600.
The last means that the wiring is OK, but there is some strange problem that we cannot fix.
Also the debugging is not possible at all baud rates, even at 2400 bps.
We have performed independent additional testing of the FT231XQ performance at different speeds, it looks OK.
The timing and fronts also look OK on the oscilloscope, like those using FT232RL.
Can you help us to determine where is our problem with the programming / debugging of the RCM6700?
I can save some screenshots from the oscilloscope and send them to you, if it will help you to discover the problem.