|Demand Peripherals Robotics and Automation Made Easy|
LCD6: Six Digit LCD Display
The LCD6 six digit LCD display card has six large, easy to read, 7-segment digits that are controlled by the LCD6 peripheral in the FPGA.
The LCD6 card drives the segments of the LCD using the putputs of a 749595 shift register. The clock to the shift registers uses the 7474 quadrature clock scheme from the ESPI card. Note that in the LCD6 card there are two data lines from FPGA and that one of the shift registers is clocked on the negative edge of the clock. Using two data lines and clocking on both edges lets the LCD shift registers fill in 8 clock cycles from the FPGA.