Introduction - If you have any usage issues, please Google them yourself
The design is based on VHDL language to achieve bit serial RS232 communication bus according to the determinant of matrix keyboard interface circuit with a reset, and serial data reception and transmission capabilities, according to light-emitting diode display led0-led2 status can be judged chip work to achieve all the circuit functions of the program are produced in the United States has ALTERA Field Programmable functions EPM7128SLC84-15 on-chip debug passed. The circuit design of daily life, practical, post-produced chips can be used as a general PC, the keyboard and the host interface.