SPI with Double data rate

[tommy0804]

We have a requirement with 4 SPI buses working simultaneously. And, all the MISOs should support DDR(double data rate).
Is this possible in ESP32?

[ESP_Sprite]

No, the ESP32 only has two SPI buses free, and they do not support DDR. You may be able to fake something with e.g. the parallel mode of the I2S peripheral, but that depends on your use case; if you can tell a bit more about what you need this for, we can probably help you better.