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I am working on Android AOA project with FT312 chip. There is well known bug in Android where after Andoird app restarting there is a problem with inputstream data flow. Simple solution is to reconnect USB cable but that is not ok for me.

The question is: If putting low FT312 RST pin gives me same result as unpluging USB cable? I wonder bacause charging will be still present. Question is if android USB port get full reset and problem with bug will be avoided.

Of course there is another solution: turning off +5V supply for FT312 and USB port for a while and turning on again. I am sure that will be work but that solution needs MOSFET power switch on board. Using RST pin of FT312 will be much more simple.

Thank You for reply

Regards

Łukasz Szczeciński
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  • I had a project where I used RST button. Never seen any difference between cable (un)plug and RST button. I am not quite sure about your chip, but as soon as bug is on Android side, there shouldn't be any difference for Android, hence it should solve it. – Emil Dec 11 '21 at 21:42
  • @Emil Finally I add Charging Manager IC between FT312D and USB connector to increase charging current. It has own EN pin which can cut off DM DP and +5V so that will be right solution to avoid Android bug. – Łukasz Szczeciński Dec 13 '21 at 08:52

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