Memory card with multiple modes, and host device corresponding to the memory card

A memory card comprising:

• a first surface including 1st to Nth rows, where N is an integer of two or greater, each of 1st to Nth rows being an area where three or more terminals are located;
• and
• a second surface facing an opposite side from the first surface,
• wherein, under a first mode:
• terminals, located in the 1st row, include two or more terminals to which differential clock signals are assigned, at least one terminal to which a single-ended signal is assigned, and at least one terminal to which a first power supply voltage is applied, and
• terminals, located in a Kth row, include two or more terminals to which differential data signals are assigned, where K is an integer no smaller than two and no greater than N;
• and
• wherein, under a second mode, terminals, located in the 1st row, include at least one terminal to which a single-ended signal is assigned.