An electronic device having an LCM has a main body and an LCM. The memory cell array block includes at least one cell string having a plurality of memory cells serially connected to a bit line and alternately connected to even word lines and odd word lines. Light transducers on the printed circuit board are of two main types, light emitters and light receivers. The plurality of scanning units includes a first scanning unit and a second scanning unit. Time intervals Tsc1off1 and Tsc2off1, and time intervals Tsc1off2 and Tsc2off2, where the sets of the first and second switching circuits all are off, are at least partially overlapping. The outsole can also include a different tread pattern for the heel portion, or the circular tread pattern may also extend into the heel portion.