System and method for debugging clb logic element states using only one pin

A method for debugging a plurality of logic elements in a field-programmable gate array, wherein each logic element of the plurality of logic elements is associated with a particular logic state, the method comprising:

• generating a synchronization pulse using a synchronization pulse generator;
• connecting to each logic element and outputting, in turn, the particular logic state of each logic element using a digital selector switch;
• receiving and outputting, in turn, the synchronization pulse and the particular logic state of each logic element using an output buffer;
• enabling first, second, and third digital outputs levels using a voltage divider resistor network of first and second resistors connected to an output line of the output buffer, wherein the digital output levels correspond to the synchronization pulse, a low particular logic state, and a high particular logic state;
• outputting, in turn, the synchronization pulse and the particular logic state of each logic element using a single debug pin connected to the output line of the output buffer after the voltage divider resistor network;
• and
• visualizing, in turn, the synchronization pulse and the particular logic state of each logic element on a display device as the first, second, and third digital outputs levels.

A method of debugging a plurality of logic elements in a configurable logic block, wherein the plurality of logic elements includes between twenty-eight (28) and one hundred thirty-two (132) logic elements, and wherein each logic element of the plurality of logic elements is associated with a particular logic state, the method comprising:

• generating a synchronization pulse using a synchronization pulse generator;
• connecting to each logic element and outputting, in turn, the particular logic state of each logic element using a digital selector switch;
• receiving and outputting, in turn, the synchronization pulse and the particular logic state of each logic element using an output buffer;
• enabling first, second, and third digital outputs levels using a voltage divider resistor network of first and second resistors connected to an output line of the output buffer, wherein the digital output levels correspond to the synchronization pulse, a low particular logic state, and a high particular logic state;
• outputting, in turn, the synchronization pulse and the particular logic state of each logic element using a single debug pin connected to the output line of the output buffer after the voltage divider resistor network;
• visualizing, in turn, the synchronization pulse and the particular logic state of each logic element on an oscilloscope as the first, second, and third digital outputs levels;
• and
• sharing the single debug pin with one or more other functions of the configurable logic block when the single debug pin is not being used for debugging.