Structure and function of the MCS-51 series Structure and function of the MCS-51 series one-chip computer MCS-51 is a name of a piece of one-chip computer series which Intel Company produces。 This company introduced 8 top-grade one—chip computers of MCS—51 series in 1980 after introducing 8 one-chip computers of MCS-48 series in 1976. It belong to a lot of kinds this line of one—chip computer the chips have，such as 8051， 8031, 8751， 80C51BH, 80C31BH ， etc 。 , their basic composition, basic performance and instruction system are all the same. 8051 daily representatives— 51 serial one-chip computers 。 An one—chip computer system is made up of several following parts: （ 1) One microprocessor of 8 (CPU）。 ( 2） At slice data memory RAM (128B/256B）,it use not depositting not can reading /data that write, such as result not middle of operation ， final result and data wanted to show, etc. ( 3 ） Procedure memory ROM/EPROM (4KB/8KB )， is used to preserve the procedure , some initial data and form in slice. But does not take ROM/EPROM within some one-chip computers， such as 8031 , 8032， 80C ，etc。. （ 4） Four 8 run side by side I/O interface P0 four P3, each mouth can use as introduction ， may use as exporting too. （ 5） Two timer / counter, each timer / counter may set up and count in the way, used to count to the external incident ， can set up into a timing way too, and can according to count or result of timing realize the control of the computer。 ( 6） Five cut off cutting off the control system of the source . （ 7) One all duplexing serial I/O mouth of UART (universal asynchronous receiver/transmitter (UART ） ） , is it realize one-chip computer or...
