Portable universal 51 one-chip microcomputer teaching experimental instrument

The utility model relates to a teaching experimental instrument, especially to a portable universal 51 one-chip microcomputer teaching experimental instrument, composed of a core control module, a peripheral module and a download module. The core control module is composed of a 40-pin direct insertion type main control chip and a minimum supporting circuit of a STC89C/SXX series of a STC company and a 40-pin direct insertion type main control chip and a minimum supporting circuit of an AT89C/SXX series of an ATMEL company, the peripheral module is mainly composed of some common peripheral device interface circuits, and the download module is mainly composed of a CH341A chip and a supporting circuit thereof. The download module of the experimental instrument enables the download to be realized in a manner of transforming a USB interface into a serial port or parallel port and is convenient for the uses of the desk type and notebook computers not having the serial port and the parallel port at present, meanwhile, the experimental instrument can obtain a work power supply from a PC via the USB interface and support the joint debugging with a KEIL software, and integrates the editing, coding, download and debugging as one. The experimental instrument is small in volume and convenient in interface connection, is conducive for students to grasp the 51 series one-chip microcomputer principle and an integrated project development technology better, and enables the manipulative ability and innovation capability of students to be improved.