state keyboard
2.In the state of “Digital Generally Used Input” click on the “key-board” in the right of the stative form,the soft-keyboard of “Digital Generally Used Input”appeared.
4.This paper introduces the general design method of SOC (System On a Chip) using EDA tools, gives some cases of IP, then implement a real System on EPM7128SLC84-15,a chip of ALTERA company, this system including :scan and recognition of matrix keyboard ,calculation of add, sutu multiply under the control of state machine, the display of result on computer screen.

