The present invention shows a portable elevated vehicle display that may be lowered for a vehicle to be loaded on a display platform. The nonvolatile memory permits write of data if the number of pulses of a clock signal transmitted as well as the data agrees with a prescribed number and the nonvolatile memory inhibits write of data if the number of pulses of the clock signal does not agree with the prescribed number of pulses. The column address decoder commences reading out two candidate data for the first bit by inputting each of the two candidate data to each of the two sense amplifiers SA_M0 and SA_M1, respectively, before all bits of the column address signal are established. In this case, upon setting bookbinding print, pages are displayed in a spread state and order after bookbinding.