An MMC form-factor flash memory device can include a non-volatile memory cell array and a multimedia card interface circuit that is configured to interface with an external host system using a multimedia card communication protocol. A peripheral circuit is configured to control read/program/erase operations of the non-volatile memory cell array under the control of the multimedia card interface circuit, wherein the non-volatile memory cell array, the multimedia card interface circuit, and the peripheral circuit are on a single integrated circuit chip. Related methods of operating are also disclosed.