Design of real-time data acquisition display system based on MCU and CPLD

Data acquisition is an important means of signal processing;Aiming at the demand of seeker voltage examina- tion,a design method of real-time data acquisition display system is presented.The signal pretreatment circuit is given. Using CPLD EPM7128SLC and 8-channel analog multiplexers ADG508A achieve the signals channel choice design.The using method of A/D converter on MCU 80C196KB is introduced in the gathering circuit.The data transmission between PC and MCU is achieved by using dual-port static SRAM IDT7130.Under the PC parallel-port EPP mode,by adopting WDM drive mode,the real-time read and display of gathering data are completed.It has been found that this system can meet the requirements of multi-channel voltage gathering real-time display.The system circuit design method is simple, and it has high reliability. Its gathering channels have the scalability.