10.1.6.3.1 QSPI Supported Operation
The following table summarizes the supported operating modes (Single Data Rate, Double Data Rate, or none) of the QSPI peripheral as a function of the ratios between CPU_CLK, MCK, QSPI 2x MCK and QSCK frequencies. Frequencies are expressed in MHz.
| CPU_CLK | MDIV | MCK | STH/WCS | QSPI 2x MCK | QSCK | Supported Operation |
|---|---|---|---|---|---|---|
| 600 | 3 | 200 | STH | 400 | 50 | SDR and DDR |
| 4 | 150 | STH | 300 | 75 | SDR and DDR | |
| 540 | 3 | 180 | STH | 360 | 60 | SDR and DDR |
| 4 | 135 | STH | 270 | 67.5 | SDR and DDR | |
| 420 | 3 | 140 | WCS | 280 | 70 | SDR and DDR |
| 4 | 105 | WCS | 210 | 52.5 | SDR and DDR |
Note: "–" means the operation is not
supported.