Semiconductor device and power control method therefor

摘要

A semiconductor device comprises a plurality of circuit blocks, a plurality of local wirings which supply power to the plurality of circuit blocks, respectively, a global wiring which supplies the power to the plurality of local wirings, a plurality of first switches which are disposed between the plurality of local wirings, respectively, and the global wiring, and a second switch which is disposed between two local wirings. A power control unit controls open/close of the plurality of first switches and the second switch based on the potential difference between the two local wirings.

主权项

1. A semiconductor device comprising:
a plurality of circuit blocks which comprise at least a first circuit block and a second circuit block; a plurality of local wirings which supply power to the plurality of circuit blocks, respectively; a global wiring which supplies the power to the plurality of local wirings; a plurality of first switches which are disposed between the plurality of local wirings, respectively, and the global wiring; a second switch which is disposed between two local wirings; a control unit configured to control open/close of the plurality of first switches and the second switch based on a potential difference between the two local wirings; and a determination unit configured to generate a determination signal indicating that a potential difference between the two local wirings is not more than a reference value, wherein the control unit controls open/close of the plurality of first switches and the second switch in accordance with a power control command and the determination signal.