Patent ID: 6857093

Claim:
A semiconductor integrated circuit device formed on a main surface of a semiconductor substrate, comprising: a plurality of internal circuits formed on said main surface; a first power supply interconnection for supplying a first external power supply potential externally provided to said semiconductor integrated circuit device to said plurality of internal circuits; a second power supply interconnection for supplying a second external power supply potential externally provided to said semiconductor integrated circuit device to said plurality of internal circuits; an internal power supply circuit, provided between a prescribed one of said plurality of internal circuits and said second power supply interconnection, for converting a level of said second external power supply potential to supply an internal power supply potential to said prescribed internal circuit; a testing circuit for conducting a self-test of said semiconductor integrated circuit device, said testing circuit including a measuring circuit for detecting a current amount being supplied from said internal power supply circuit to said prescribed internal circuit; and a data output circuit for outputting said detected result outside said semiconductor integrated circuit device.