Semiconductor device and communications terminal and automobile having the same
First Claim
1. A semiconductor device operating at any predetermined frequency among a plurality thereof, and having a plurality of power source networks that supply power from a power source to functional units in the semiconductor device, comprising:
- a switching unit respectively provided along said plurality of power source networks for switching ON/OFF the supply of power from the power source to said functional units;
a storage unit configured to map and store each of said plurality of predetermined frequencies and switching information designating an ON state or an OFF state of said switching unit; and
a control unit configured to read, from said storage means, switching information corresponding to a current operating frequency, and control the ON/OFF switching of said switching means in accordance with the read switching information.
2 Assignments
0 Petitions
Accused Products
Abstract
A semiconductor device is disclosed in which resistance to the influence of external noise on internal power source network is improved. A semiconductor device operating at any predetermined frequency among a plurality thereof, and having power source networks for supplying power from a power source to internal functional units in the semiconductor device comprises switches, a storage unit, and a control unit. The switches are provided in the power source networks, and switch ON/OFF the supply of power from the power source to the functional units. In the storage unit are mapped and stored a plurality of predetermined operating frequencies and switching information designating an ON state or an OFF state for the switches. The control unit reads, from the storage, switching information corresponding to a current operating frequency, and controls the ON/OFF switching of the switches in accordance with the read switching information.
-
Citations
7 Claims
-
1. A semiconductor device operating at any predetermined frequency among a plurality thereof, and having a plurality of power source networks that supply power from a power source to functional units in the semiconductor device, comprising:
-
a switching unit respectively provided along said plurality of power source networks for switching ON/OFF the supply of power from the power source to said functional units;
a storage unit configured to map and store each of said plurality of predetermined frequencies and switching information designating an ON state or an OFF state of said switching unit; and
a control unit configured to read, from said storage means, switching information corresponding to a current operating frequency, and control the ON/OFF switching of said switching means in accordance with the read switching information. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
Specification