Patent ID: 7779277

Claim:
A semiconductor integrated circuit including on a single chip a plurality of circuit blocks and a plurality of internal power supply circuits for delivering a common supply voltage to the plurality of circuit blocks, the semiconductor integrated circuit comprising: a shared power supply interconnection for connecting the plurality of circuit blocks and the plurality of internal power supply circuits; an external pad connected to the shared power supply interconnection; a plurality of AND circuits provided to correspond to the circuit blocks, each of which outputs a logical product of a circuit block test control signal which is switched to the H level to place the corresponding circuit block in the test mode and a supply voltage stop instruction signal which is switched to the H level to stop the delivery of the supply voltage; and an OR circuit which outputs a logical sum of the logical products delivered by the AND circuits as the power supply control signal, wherein whether or not each of the internal power supply circuits delivers the supply voltage is controlled by the power supply control signal when at least one of the plurality of circuit blocks is in the test mode.