why connect 68013's data bus to an external FIFO 68013 can't renumeration | Cypress Semiconductor
why connect 68013's data bus to an external FIFO 68013 can't renumeration
I use the 68013's GPIF to read data from an external FIFO. It's strange that when I connect the 68013's data bus to external's output databus,68013 can't renumeration, I disconnect them it can renumeration.
At the beginning I thought the problem may be at the register GPIFIDLECS which control wether drive the data bus in idle state. So I set the IDLEDRV to be 0, which means not drive the databus in the idle state. But it can't also renumeration.It really confused me. I don't know where the bug is.