Patent ID: 7342404

Claim:
An integrated circuit, comprising: a first plurality of externally inaccessible circuit points, said integrated circuit providing a reference signal and electrical signals via one of said first plurality of externally inaccessible circuit points for test purpose; a second plurality of externally inaccessible circuit points, providing electrical signals to be monitored for test purposes; a first externally accessible contact; a second externally accessible contact; a first multiplexer having an output connected to said first externally accessible contact, and having a plurality of inputs, each of said plurality of inputs being connected to one of said first plurality of circuit points; a second multiplexer having an output connected to said second externally accessible contact and having a plurality of inputs, each of said plurality of inputs being connected to one of said second plurality of circuit points, permitting external access to said electrical signals; wherein the reference signal applied to said first externally accessible contact is a reference signal allowing a determination of a timing of the electrical signal applied to a second externally accessible contact.