英文摘要
In recent years, as computer penetration in the social field and
large-scale development of integrated circuits, microcontroller
applications are continually deepening, because of its powerful
function, small size, low power consumption, cheap, reliable,
easy to use, etc. therefore particularly suitable for systems with
control of more and more widely used in automatic control,
intelligent instruments, meters, data acquisition, military
products and home appliances fields,
As one of the main branch of microcomputer, microcontroller in
the structure of the biggest feature is the CPU, RAM and ROM
memory, timer and multiple I / O interface circuit integrated on
a VLSI chip. The composition and function from its point of
view, a single chip is actually a computer.
This design is the use of MSC-51 microcontroller to design the
four-digit calculator, using C programming language to achieve
calculator functions. 4X4 external keyboard, the keyboard scan
to finish by the number of control values and make the drive
circuit to the cathode results in a total of seven-segment digital
tube display properly, and has cleared at any time to complete
key calculation and display clear. Calculator to complete an
integer from 0 to 9999 plus / minus / multiply / divide.