| 摘要 |
A NOR flash memory controlling data hold time according to a clock frequency is provided to satisfy parameter characteristics related with data output regardless of the clock frequency, by controlling the delay time of a clock signal. A NOR flash memory cell(100) includes a memory cell(110). A sense amplifier(120) senses data stored in the memory cell. A data output buffer(140) outputs data sensed by the sense amplifier in response to a clock signal. A clock delay circuit(160) delays an external clock signal, and provides the clock signal to the data output buffer. A delay control circuit(170) controls delay time of the clock delay circuit according to the frequency of the clock signal. The data output buffer controls data hold time of the sensed data in response to the clock signal, and the delay control circuit controls delay time of the clock delay circuit according to a latency value stored in a mode register.
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