Eternyt:
So I'm not able to interface to my chip because of the resistor dividers? So I don't understand why on the GitHub page of the library the Arduino UNO is completely supported...
What do you suggest to interface this chip? I see that the ESP8266 are supported, can I use my NodeMCU?
Also, I don't understand what the TiBackup and the Lifter (with relative schematics) are.
Many thanks!
Those schematic are examples of how I have successfully connected 25Q64 devices to Arduino Processors, the TiBackup show how a directly connect to a AVR processor running on 3.3v The second schematic show how I interfaced the 3.3V 25Q64 to a 5V Arduino Mega. The resistor divider circuit not recommended for SPI devices because of the high frequency (fast) signals. The resistor's limit the current drive. This limited current and the parasitic capacitance modify the signal waveforms. Depending on the exact capacitance of your circuit you may not achieve reliable communications with the Flash chip. The 10k resistor limits the maximum current to 0.5mA as the voltage at the tap point increase this drive current is reduced. Instead of a crisp 0V to 5V translations the Flash will see a distorted wave. Read this example from Joonas Pihlagamaa .
Chuck.