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Raspberry Pi 5 Gets a MicroSD Express Hat
Will Whang’s RPI5-SDexpress-Hat is a small HAT+ for the Raspberry Pi 5, adding a microSD Express card slot for ultrafast storage, an eject button, and two Qwiic connectors, probably because there was still some spare space on the board… As a reminder, microSD Express cards can deliver SSD performance thanks to the use of of PCIe interface and NVMe commands. The standard was first introduced in 2019, and even earlier (2018) for full-size SD cards, but manufacturers have not exactly rushed to release compatible hardware.
Will Whang’s RPI5-SDexpress-Hat is a small HAT+ for the Raspberry Pi 5, adding a microSD Express card slot for ultrafast storage, an eject button, and two Qwiic connectors, probably because there was still some spare space on the board… MCU – WCH CH32V003 RISC-V microcontroller for hotplugging and unmount Host interface – PCIe Gen3 x1 FFC connector Expansion – 2x Qwiic connectors Misc – Eject button, Power LEDs, Mounted LED Power Management 5V supply via 40-pin GPIO header (6-pin header used) 1.8V/3.3V fixed output LP5907 voltage PAM2306 step-down DC convertor for 1.8V voltage The design is fully open-source with KiCad schematics and BoM available on GitHub, where you’ll also find the firmware binary for the STM8S CH32V003 MCU, but no source code.
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