Realtek also provided a (RTL9210B-CG EVB) which included a USB-C receptacle, NVMe M.2 M-key slot, SPI flash socket, and two LEDs.
The 2021 timeframe saw significant firmware and documentation updates focused on device stability: rtl9210b datasheet 2021
: Uses a "PEDET" interface to automatically detect and switch between USB-to-PCIe and USB-to-SATA modes. USB Standard : Supports USB 3.2 Gen 2 (formerly USB 3.1 Gen 2) with bandwidth up to Transfer Protocols : Supports both Bulk Only Transfer (BOT) USB Attached SCSI Protocol (UASP) for high-speed transactions. Power Management Realtek also provided a (RTL9210B-CG EVB) which included
: Supports NVM Express Base Specification Rev. 1.3 with an embedded driver in RAM/ROM/SPI Flash. NVMe M.2 M-key slot
: Supports SATA Gen3 (6Gbps) with backward compatibility for Gen1/Gen2.