Q: When I used the MAX5483 digital potentiometer with SPI interface, the program can be used to the modify the RAM value and then the resistance value. However, the adjusted resistance value could not be saved to the non-volatile memory. The program follows this sequence: CS is set low; prepare 1 bit data; wait for the rising edge of CLK; send 00100000, then the CS is pulled up. Please help debug.
A: The operation itself does not seem to have any issues. In order to save the data to the NV, it would require a certain amount of time. There is a 12ms required wait time after the CS has been pulled up; during this period, do not conduct any SPI operations, then try to see if it has been successfully saved to the NV.