SDIO
References
| SD Specifications Part E1 SDIO Simplified Specification | https://www.sdcard.org/developers/overview/sdio/sdio_spec/Simplified_SDIO_Card_Spec.pdf |
| SD Specifications Part E1 SDIO Simplified Specification | https://www.sdcard.org/developers/overview/sdio/sdio_spec/Simplified_SDIO_Card_Spec.pdf |