How do you identify a buried node in CPLD?

To identify a buried node in a Complex Programmable Logic Device (CPLD), you can use a combination of tools like a schematic viewer and a logic analyzer. First, trace the signal paths in the schematic to locate the node in question, then verify its connections and functionality using simulation tools. Additionally, employing a physical inspection or using software tools that provide netlist analysis can help confirm the presence of buried nodes. Always consult the device's datasheet for specific details on its architecture and configuration.