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US 6,480,033 B2Granted
Semiconductor device
AssigneeFujitsu Limited
InventorNaoharu Shinozaki
Life of this patent
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Abstract
A semiconductor integrated circuit including a semiconductor device has a command decoder unit for decoding command signals synchronously with an external clock. An internal signal whose timing precedes the timing of the command decoder unit decoding the command signals is used to reset the command decoder unit. Preferably, a signal produced by a DLL is used as the internal signal. Consequently, a margin in timing of actuating the semiconductor device is expanded.
Claims7
A semiconductor integrated circuit comprising:
- a command decoder unit for decoding command signals;
- a command decoder control circuit outputting a control signal to said command decoder unit, said control signal resetting said command decoder unit before said command decoder unit decodes said command signals, and said control signal activating said command decoder unit after all of said command signals are input to said command decoder unit;
- and
- a command latch circuit for latching external command signals in response to a clock signal and for outputting said command signals to said command decoder unit.
1 more element
Dependencies are inferred from the claim text.