Abstract
51 SCM is currently the most widely used one of the 8-bit microcontroller,
and its representative model is the ATMEL AT89 series, it is widely used in
industrial control systems. At present, many companies have 51 series
compatible launch, will occupy a lot of the market at present and the future for a
long period of time. 51 SCM is one of the fundamentals of SCM is still the most
widely used one. Therefore, as the college students of the new century, the rapid
development of information industry, to grasp the basic structure, principles and
use of the microcontroller is very important.
This work is STC89C52 chip as the main microcontroller chip, matrix
keyboard, double-machine communications ,thermometer, function modules,
between the button control for switching between the various functional modules.
Data input through the keyboard matrix of input data is displayed on the digital
tube; serial communication module can achieve double-machine communications
thermometer can be real-time display of the current ambient temperature.
Protel DXP 2004 combine Project management, the PCB and schematic
map of the two-way synchronization technology, multi-channel technology,
automatic routing technology and a strong circuit simulation technology together
perfectly. Protel DXP provides a rich library, including the principle of symbols.
PCB package, SI model and simulation model can easily synchronize edits. The
main demands of the curriculum design master principle circuit design, PCB
design and simulation.
KeyWords:STC89C52 ,Data input Thermometer ,Protel DXP,PCB design
tools,schematic design