Abstract
In recent years, with the rapid development of science and technology, the
single-chip microcomputer applications are continually deepening, and at the same
time promote the traditional control of the increasingly technical updates. In the
real-time detection and control of the single-chip microcomputer application system,
microcontroller as a core component often use only SCM knowledge is not enough, and
also on specific hardware structure of hardware and software combination to be
perfect.
Crossroads shuttle vehicles, pedestrians Xining, the cab company lane, people
walkways, methodically. What is less discipline order to achieve this? By the traffic
light automatically command control system. the traffic lights are many ways. the
system uses msc -51 series monolithic integrated circuits atsc51 and the programmatic
interface chip 8255a parallel i turned around for a device for the traffic signal
controller nearby to be based on actual through 8051 p1 of the chip set of red, green
lights time functions ； the traffic light, the need to five seconds for yellow lights
flashing warning （ the traffic light signal passes through the pa of output and time
through 8 directly .
Key words：MCU chip ATSC51；Traffic lights；Red-light running
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