* Operating Voltage (VDD): 3.3V~5.5V
* SPI pins Voltage (VDDIO): 1.8V~VDD (Less than VDD voltage)
* Fully integrated internal 12MHz oscillator with 0.25% a.

that communicate with various types of SPI. The device includes a USB 2.0 full speed compatible interface which is used .

strings
*
* Integrated an internal 1.5kΩ pull-high resistor on D+ pin
* Serial Interface
  – SPI
*
* Supports clock rate up to 8MHz
*
* Supports Master and Slave modes decided by AP command
*
* Supports .

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