Power Pins
- VIN - this is the power pin. Since the flash chip may use 3 VDC, we have included a level shifter on board that will take 3-5VDC and safely convert it down. To power the board, give it the same power as the logic level of your microcontroller - e.g. for a 5V microcontroller like Arduino, use 5V.
- 3V3 - this is the 3.3V output from the level shifter, you can grab up to 100mA from this if you like.
- GND - common ground for power and logic.
SPI Logic Pins
- SCK - This is the SPI Clock pin / SCK Serial Clock, it's an input to the flash chip.
- MISO - this is the Serial Out / Microcontroller In Serial Out pin, for data sent from the flash chip to your processor.
- MOSI - this is the Serial In / Microcontroller Out Serial In pin, for data sent from your processor to the flash chip. It's an input to the chip.
- CS - this is the Chip Select pin, drop it low to start an SPI transaction. It's an input to the flash chip and has a pullup.
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