Abstract The Boolean processing technology to scan the keyboard matrix interpretation: use of "digital" mode of operation will interpret the whole process of scanning the keyboard matrix down to a series of "bit" of the operation; scan interpretation process does not key terms, there is no key return the corresponding eigenvalue; order to facilitate the circuit board design layout, constitute the input of the keyboard matrix lines can be concentrated in the mouth of the same P, it can be freely distributed in different P mouth. The keyboard matrix scanning simple, efficient, understanding more crisp and IRFP250 datasheet and accurate. Introduction traditional types of electronic textbooks and IRFP250 price and professional literature data available, the MCU to do the scanning keyboard matrix interpretation, mostly by line b...