Hello,
We are using STM32H573AII3Q in our application. One external IC is interfaced with this uC through SPI lines.
We are observing a tristate on MISO line. To investigate we isolated the uC and checked the MISO line. It is having a voltage level of around 0.4V. Ideally it should be pulled up as we have connected 46.4k pullup resistor on MISO line.
SPI MISO signal image when external IC is isolated from uC.
Just want to know how we can resolve this tri-stating issue?
Thanks
Madhurani
