1, How to connect the AD7388-4 four-wire mode hardware, my hardware platform is STM32H750 Figure 2 shows the QSPI wiring mode of the microprocessor. One CS and one Clk have four Sdos without additional SDI connection. I would like to ask if my SDO O is SDI without additional SDI connection if the four-wire mode is configured. AD7388-4 is connected with an additional SDI. If there is any problem with my understanding, I would like to ask you how to connect it, or this QSPI cannot be used.Or I tried to add a normal SPI making AD7388-4 to initialize stm32H750 QSPI only to do receiving.
2. AD7388-4 two-wire mode SPI4 as SPI host and SPI5 as SPI slave. How much data CLK needs to meet to meet the 4-channel 4M parallel port sampling rate through DOUTA and DOUTB。
3. After the configuration is completed, see from the timing diagram whether I only need to pull down the CS pin to directly receive data without additional instructions.
