I am trying to control a serial dataflash memory through an mbed. It is an AT45DB021B and the datasheet is here. It has a reset pin that I have wired to the mbed so that a software reset can be done. I heard that a software reset makes things easier so that a hardware reset, i.e. shutting off power and turning it back on, is not needed. I noticed that when I do a hardware reset, whatever is in the buffer is overwritten by random values. However, when I do a software reset, the buffer is unaffected. Nothing seems to change on a software reset. Is this normal?