エンジニア風味 (Engineer-taste)

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FTDI-taste

Data loss issue in FTDI FT232H and FT2232H Sync 245 FIFO Mode (Clock Control)

I analyzed the Sync FIFO Mode data loss that FT device was going well but data loss caused. As below figure, the couter or FIFO is controled by FT device and data transpose to PC.FT232H & Counter(FIFO)When #TXE is Low, data intake to FT de…

Data loss issue in FTDI FT232H and FT2232H Sync 245 FIFO Mode (Part3)

coutinuation of PART2 I examined various signal of FT232H. And I found TXE# status signal go to Low level without timing of FT_READ. For example TXE# go to Low when is in FT_OPEN or FT_Purge.TXE# waveform in FT_OPENTXE# waveform in FT_PURG…

Data loss issue in FTDI FT232H and FT2232H Sync 245 FIFO Mode (Part2)

Continuation of Part1I searched and found several same data-loss case. This trouble can see since early 2010's, and even now. The data-loss causes every 500 data (my case is every 510). And remaining data is correct. Such as device like FT…

Data loss issue in FTDI FT232H and FT2232H Sync 245 FIFO Mode (Part1)

FT232H (FT2232H) has SYNC 245 FIFO mode, and this mode works several score times as BitBang mode. To work FT232H(2232H) in SYNC 245 FIFO mode, it needs to rewrite EEPROM. In this page, I omit how to rewrite.In SYNC 245 FIFO mode, FT232H ge…