We too found that the FT232R is unusable in bitbang mode. After much to-and-froing, FTDI support eventually acknowledged that even their later hardware revision

We too found that the FT232R is unusable in bitbang mode. After much to-and-froing, FTDI support eventually acknowledged that even their later hardware revision "C" is still buggy, despite what the errata sheet implied. We switched to the FT230X, which works great. Our detailed investigation: https://stb-tester.com/blog/2016/05/26/ir-post-mortem https://stb-tester.com/blog/2016/05/26/ir-post-mortem