A serial peripheral flash memory device uses a plurality of dummy inputoutput terminals to enable the selection of a parallel mode for devices that have a slower serial clock speed. The cover can be easily donned and doffed without contaminating the space suit. A mode detection circuit is included that receives the buffered address control signal and produces a burst control signal. A groove is formed on the supporting surface adjacent to the side wall and is distributed along the side wall. The first matrix contains the binary values of the subset of pixels.