Embedded multimedia card (eMMC), host controlling eMMC, and method operating eMMC system

摘要

An embedded multimedia card (eMMC) includes a clock channel that receives a clock signal from a host, a command channel that receives a command from the host, a plurality of data channels that transmit data to the host, and a return clock channel that transmits a return clock synchronized with the data to the host.

主权项

1. An embedded multimedia card (eMMC) comprising:
a clock channel that receives a clock from a host via a clock line; a command channel that receives a command from the host via a command line; a plurality of data channels that transmit data to the host via data lines in accordance with the received command; a return clock generator that generates a return clock based on the received clock; a return clock channel that transmits the return clock to the host synchronously with the data via a return clock line separate from the clock line, the command line, and the data lines; and a reference voltage generator that generates a reference voltage based on input/output operating voltages received from the host, a difference between the input/output operating voltages defining half the swing range of the received clock.