For Dell Wyse 3040 to SDIO TF Wireless Network Card Adapter SDIO EMMC Storage Memory Card Expansion Module for SDIO NGFF E KEY

Adapter Suitable for Dell Wyse3040 to TF Only SDI0 Mode Professional Power Chip Professional Design Parts Protective CoverFor Dell Wyse 3040There is a rumor that the PCIe lanes on this device are restricted, supporting only SDIO mode. (Note: The units currently sold have tin-plated gold fingers. According to the seller's tests, this does not affect functionality. Please consider carefully if this concerns you.)Design Considerations:Since the SDIO protocol does not support hot-swapping, and the device uses DC power internally, it is essential to first power off the device. Assemble the adapter board, insert the memory card, and ensure everything is properly installed before powering the device on.The seller has thoughtfully added professional power protection using a specialized power management chip, which provides ultra-fast microsecond-level short-circuit protection. This effectively safeguards the memory card from damage, even when using incompatible or damaged TF cards. The board features full-length data trace routing with professional design techniques, including serpentine trace layouts for equal-length routing, ensuring consistent length for every data line.There is a port called SDIO NGFF E KEY (often incorrectly referred to as Mini PCIe; it is not the same). This port supports standard 4-bit eMMC designs (we offer TF-to-eMMC adapter boards) and is also compatible with some TF cards that use the SDIO protocol. (Note: Some high-speed TF cards operate on the PCIe bus and are not supported. Those using the slower SDIO protocol, however, are compatible.)TF cards known to use the SDIO protocol include:Hiksemi SDXC U3 64G (with the small yellow duck printed on the Hikvision version)KIOXIA EXCERIA G2 128G Blue Card (as shown in the image below)It is recommended to use lower-end cards from series like U1 or U3, as they are known to be compatible, with read/write speeds ranging from 30 to 80 MB/s.As for eMMC, the performance is expected to be less than ideal, likely similar to that of TF cards. The reason is that the bus lacks 8-bit data support and only operates in 4-bit mode. This makes it more suitable for research and experimentation. Given the many variations of eMMC, it is difficult to generalize compatibility.