The MMC HAT (Hardware Attached on Top) adds a second microSD socket. Can be used on Raspberry Pi A+, B+, Zero (with headers), Zero W* (with headers), 2B, 3B*, 3B+* and 4B. The Raspberry Pi 4 has th...Read More…
The MMC HAT (Hardware Attached on Top) adds a second microSD socket.
Can be used on Raspberry Pi A+, B+, Zero (with headers), Zero W* (with headers), 2B, 3B*, 3B+* and 4B.
The Raspberry Pi 4 has three SD controllers so you can use onboard SD, WiFi and the MMC HAT (SD) at the same time on the Pi4!
When using with a Pi4 please add "dtparam=mmchat_pi4" to the TOP of the config.txt file in the boot directory
Examples of what you can use your MMC HAT for are.
With the standard SD clock speed a micro SD card in the MMC HAT (/dev/mmcblk2) performs at similar speeds to the onboard micro SD card (/dev/mmcblk0).
The standard MMC HAT package contains:
(* When used on a Raspberry Pi Zero W, 3B or 3B+ the on-board WiFi is disabled as it is on the SDIO interface used by the MMC HAT).
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