My project is based on Fls_Example_S32K344 from S32DS IDE, I'm using QSPI to connect with external flash. The QSPI bus works fine for 48MHz QSPI clock. The device ID read back is 0x2C, 0x46 for two bytes as expected. However, after I increase the clock to 100MHz, I got 0x58, 0x8C. It seems the first bit get lost. After further check RM, I changed DLY coarse from 4 to 2, Tap select from 4 to 2 and enable DLL high frequency operation, and then I got correct read back. I carefully review the DLL bypass mode in RM but still don't quite understand those parameters.
