1
Discussion - Hardware / FT2232H - PWREN# rising up with no reasons
« on: February 24, 2022, 08:53:57 AM »
Hi all,
we developed a PCB with a FT2232H chip in 245 FIFO configuration (see attached scheamtic).
Everything is working fine, except for the fact that sometimes, without no apparently reason, we lose USB communication between the PC and our board.
We think that this occurs when the PWRSAV pin goes high.
See attached image from the oscilloscope for the waveforms:
- pink trace is the VBUS on BCBUS7 (pin 59)
- yellow trace is the PWREN# (pin 60)
Any idea for how to solve this kind of issue?
we developed a PCB with a FT2232H chip in 245 FIFO configuration (see attached scheamtic).
Everything is working fine, except for the fact that sometimes, without no apparently reason, we lose USB communication between the PC and our board.
We think that this occurs when the PWRSAV pin goes high.
See attached image from the oscilloscope for the waveforms:
- pink trace is the VBUS on BCBUS7 (pin 59)
- yellow trace is the PWREN# (pin 60)
Any idea for how to solve this kind of issue?