MMC HAT for the Raspberry Pi

Description

The MMC HAT adds a second micro SD socket to your Raspberry Pi using the second SDIO interface.

The MMC HAT has many uses including:

• Micro SD card reader. Write new images, repair or modify existing Raspberry Pi installations with ease
• Additional storage, mount as your home directory, for general storage or backups
• RAID1 on the root (/) partition for added reliability
• Connector for Controller Serial Console using a USB Serial Adaptor

Compatibility

Can be used on Raspberry Pi A+, B+, Zero (with headers), Zero W*(with headers) , 2B, 3B*, 3B+* and 4B**.

• * 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
• **The Raspberry Pi 4 has three SD controllers so you can use onboard SD, WiFi and the MMC HAT (SD) at the same time

When using a Raspberry Pi 4 please add the following three lines to the TOP of the config.txt file in the boot directory.

[pi4]

dtparam=mmchat_pi4

[all]

Speed

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).

Included

The standard MMC HAT package contains:

• 1x MMC HAT PCB with pre-soldered header
• 4x 12mm M2.5 standoff
• 8x 6mm M2.5 screw
• 4x stick on feet

Price: £ 12.90