This anomaly applies to IC Rev. Engineering A, build codes QKAA-AB0.
Application
SCKFREQ is not functional at 96 MHz.
Always.
QSPI is not functional at 96 MHz SCK frequency when HFCLK is configured for the 128 MHz mode. QSPI is not functional at 48 MHz SCK frequency when HFCLK is configured for the 64 MHz mode.
Use QSPI at 48 MHz SCK frequency when HFCLK is configured for the 128 MHz CPU frequency. Use QSPI at 24 MHz SCK frequency when HFCLK is configured for the 64 MHz CPU frequency.