fenglei
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Hello,everyone.Recently,I'm working on a project with 4 ADC chips.I need to use FPGA to control 4 ADC chips synchronously with CS、SDI、SCK signals.But now,I don't know whether the pin from FPGA can drive 4 pins from ADCs and the SPI bus can work stably.Do I need to add a pull up resistor to the output pin of FPGA and set the pin as open-drain mode.Thanks.
Following is the diagram,and the SDI and SCK signals are in the same connect way.
Following is the diagram,and the SDI and SCK signals are in the same connect way.