Alcor Au89103aa1

The is a USB 2.0 Flash Drive Controller . It acts as the brain of the USB stick, managing the communication between the NAND Flash memory (where your files are stored) and the computer.

The AU89103AA1 does support UHS-II (the second row of pins on premium SD cards). If you insert a UHS-II card, it will fall back to UHS-I mode, limiting speeds to approximately 100 MB/s despite the card’s potential for 300 MB/s. For UHS-II or SD Express, a more advanced controller (e.g., Realtek RTS5261) is required. alcor au89103aa1