Microcomputer control system for programmable logic array burn-in

The programmable logic array (PLA) is a large scale integration (LSI) device. It can be considered as a two-level AND-OR ligic cirucit. The programming of this device is done in three major steps. These steps are: (1) Output burn-in for an inverted output, (2) Product burn-in to select the state of the inputs of the AND gates chosen, (3) Sum burn-in to select the OR gates to be left connected to the used AND gates. A prototype microcomputer control system to program the PLA was developed. The system is principally software dependent and uses hexadecimal notation as input data. The system is also made flexible for future modifications.