First Impression
The U0909A is a USB 2.0 SD/MMC Flash Card Reader working at USB2.0 9pin header port. It supports USB 2.0 high-speed transmission to Secure DigitalTM (SD), SDHC, SDXC, miniSD, microSD (T-Flash), MultiMediaCardTM (MMC), RS-MMC, MMCmicro, MMCmobile. The U0909A complies with Universal Serial Bus specification rev. 2.0, USB Storage Class specification ver.1.0, and SD/MMC card interface specification.
The U0909A integrates a high speed 8051 microprocessor and a high efficiency hardware engine for the best data transfer performance between USB and flash card interfaces. Use GL823 as the main chip IC.