ESP8266 Community Forum

- Sat Jan 02, 2016 2:34 pm #37720 I have searched for information about connection the bottom SPI bus to a SD card module but no success...

Do the Arduino IDE support this SPI setup?

Have anyone used the bottom pins and/or want to share information?

/404hult

- Mon Jan 04, 2016 9:15 pm #37925 https://github.com/MetalPhreak/ESP8266_SPI_Driver

- Tue Jan 05, 2016 8:22 pm #38016 The "bottom" pins are shared with the flash chip so there are lots of considerations when trying to multiplex another spi device such as boot behavior, chip selects, flash caching, etc.

- Tue Jan 05, 2016 8:40 pm #38018 You're right ! Not much info on those pins !
It would be interesting to know how we can attach, let say for example, and additional Flash, and SDCard, etc, without needing to much other pins except for CS ...