Usb-Sd Memory Device Having Dma Channels and Method of Storing Data in Usb-Sd Memory Device

摘要

Disclosed is a memory device having Universal Serial Bus (USB) interface and Secure Digital (SD) card interface, including: a plurality of flash memory units; a plurality of flash memory controllers each controlling reading and writing data on the flash memory unit; a Direct Memory Access (DMA) controller including a plurality of DMA channels each transmitting/receiving data to/from the flash memory unit in DMA mode; a Micom dividing a signal received from the USB interface and the SD card interface into data and an address and transmitting the data to the DMA controller; and an address decoder calculating positions of the received data to be written or read on the flash memory unit according to the address.