1
Discussion - Hardware / Re: FT2232H - synchronous fifo read and flow control by RD#
« on: September 09, 2020, 06:10:24 pm »
My requirement is to get the data from FT2232H using external clock on 22MHz. The clock accuracy is very important. That is why it is required to be external clock driven by the external device. The sync mode of FT2232H use extremely high clock (60MHz). The async mode is too slow. The async mode of the 2232H seems to be the perfect implementation but the specification limit the read speed up to 8MB/s (no more than 8MHz clock). That is why I'm searching for a buffering solution because in synchronous mode the FT2232H generates the clock and also the external device will generate it own 22MHz clock. The external data buffer will be filled by 60MHz and will be read by 22MHz clock. But when it fills I need of a solution to stop the data that goes to the external buffer.