Abstract
This design uses AT89C51 MCU as a main controller, and depends on a simple
external circuit to drive 64×16 the lattice LED display。 By using its own powerful
functions and capacity of internal E2PROM， it is easy to accomplish the MCU and
PC and E2PROM for internal storage， data transmission equipment ，and it also can
be used conveniently to show a variety of content changes。 The other dot matrix
display is widely used in many public places 。 Therefore, the design has a strong
practical application。The LED Display dynamic scan can show the way at the same
time four 16 × 16 dot matrix Chinese characters， and PC software can modify the
content and effect shows。 IAP used in the application of programmable technology，
the characters within the code stored in the SCM free program memory space, so that
the LED display system can store 1 ， 024 brown—out characters. SPI used in the
design of the interface standard GB2312 character 。 Because serial transmission
used, so that the system can be enhanced scalability, for a number of display units of
the cascade。 This article from the start LED display principle， elaborated on the
LED display dynamic process， as well as hardware circuit design。
Key Words ：LED；Dynamic display ;SCM ；Lattice library;AT89C51
