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1. Does the hardware SDIO interface support SD cards?

   Language English ESP8266 Faq type:  Peripherals ...

2. What is the maximum speed supported by the SDIO interface?

   Language English ESP8266 Faq type:  Peripherals ...

3. LED connected to GPIO blinks once upon power-on - why is this happening?

   Language English ESP8266 Faq type:  Peripherals ...

4. Why is there a small spike when PWM is started?

   Language English ESP8266 Faq type:  Peripherals ...

5. Why is the PWM duty cycle transitioning slowly?

   Language English ESP8266 Faq type:  Peripherals ...

6. Are the GPIO pins 5V compatible?

   Language English ESP8266 Faq type:  Peripherals ...

7. Where can I find the register descriptions and bitmap of the GPIO registers?

   Language English ESP8266 Faq type:  Peripherals ...

8. What is the buffer size on HSPI? What are the highlight features?

   Language English ESP8266 Faq type:  Peripherals ...

9. How to enable the entire 64 bytes of HSPI data buffer?

   Language English ESP8266 Faq type:  Peripherals ...

10. How do I configure (H)SPI module for data transfer?

    Language English ESP8266 Faq type:  Peripherals ...

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