Abstract
This system completes design that eight data and can establish eight data of the threshold electric voltage collects the passage, the single chip computer system and the electric circuit for scope to expand. The digital signal generator produce eight roads prepare to place of circularly move logic signal, the output signal is TTL electric voltage, signal’s clock frequency is 100 Hz, and can repeat export; The amount of digital collects passage has function that collect eight road logic signal, the input resistance of eight input circuit over 50kΩ, the threshold electric voltage can change in 0.25-4V , the saving depth of the each passage increases to 256 bits. The single chip computer system realizes below functions: may establish single class, two classes and three classes trigger word; It displays the logic state word number of eight roads input signal that time marking line to proper to the time by point array type LCD; Choice logic state to keep to display before and behind triggering; Move the light marks and turn over the page with show to trigger point; The system communicates with PC computer by series port; Scope displays expand circuit may in imitate scope stability displays eight roads signal wave of collect, displays the position that trigger point and move time marking line, and realizes to adjustable function in trigger position. The system by test, proof this system function is strong and big, the hardware design is reasonable, software run is good.
Keywords: single chip computer； digital signal generator； scope；PC computer；
LCD；communicate
