Semiconductor memory device and method for driving the same
AssigneeHynix Semiconductor Inc.
InventorsKyoung-Nam Kim, Young-Jun Ku, Hoon Choi
Life of this patent
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Abstract
A semiconductor memory device includes: a delay locked loop (DLL) clock buffer for buffering a system clock in response to the a buffer enable signal; a DLL circuit for generating a delay locked loop (DLL) clock by performing a delay locking operation using the buffered system clock; and a DLL clock buffer controller for generating the buffer enable signal in response to a code signal and a clock enable signal, the code signal containing information about whether to perform the delay locking operation.
Claims17
A semiconductor memory device, comprising:
- a delay locked loop (DLL) clock buffer for buffering a system clock in response to a buffer enable signal;
- a DLL circuit for generating a delay locked loop (DLL) clock by performing a delay locking operation using the buffered system clock;
- and
- a DLL clock buffer controller for generating the buffer enable signal in response to a code signal and a clock enable signal, the code signal containing information about, whether to perform the delay locking operation.
A method for driving a semiconductor memory device, comprising:
- generating a buffer enable signal using a code signal and a clock enable signal, the code signal containing information about whether to perform a delay locking operation;
- buffering a system clock in response to the buffer enable signal;
- and
- generating a delay locked loop (DLL) clock by performing the delay locking operation using the buffered system clock.
A semiconductor memory device, comprising:
- a register for storing a code signal containing information about whether to perform a delay locking operation;
- a delay locked loop (DLL) circuit for generating a delay locked loop (DLL) clock by performing the delay locking operation using the code signal and a clock enable signal.
Dependencies are inferred from the claim text.