eMMC 4.5 introduction

##1 System Features The eMMC device supports the following features:

• System Voltage(Vcc and VccQ) Ranges
• Ten-wire bus(clock, 1 bit command, 8 bit data bus) and a hardware reset.
• Clock frequency of 0~200MHz
• Three different data bus with modes: 1-bit(deault), 4-bit and 8-bit