Semiconductor device and power supply control method of the semiconductor device

摘要

A semiconductor device includes an internal circuit, a power supply control circuit which controls supply of a power supply to the internal circuit upon receipt of a first control signal, and a control signal generation circuit which outputs the first control signal upon receipt of a second control signal. The control signal generation circuit does not deactivate the first control signal when an inactive period of the second control signal is equal to or less than a first period and deactivates the first control signal when the inactive period of the second control signal is more than the first period.

主权项

1. A semiconductor device comprising:
a control signal generation circuit that outputs a first signal in response to a second signal; a first power supply control circuit that controls supply of a power supply to a first internal circuit in response to the first signal; and a second power supply control circuit that controls supply of the power supply to a second internal circuit in response to the first signal; wherein, the first and second power supply control circuits activate the first internal circuit after a first delay time and the second internal circuit after a second delay time different from the first delay time, respectively, in response to the first signal transitioning from an inactive to an active state; and wherein the control signal generation circuit is configured to maintain the first signal in an active state when the second signal transitions from an active state to an inactive state and remains in the inactive state less than or equal to a predetermined period, and to deactivate the first signal when the second signal transitions from the active state to the inactive state and remains in the inactive state for greater than the predetermined period.