ICS94209 查看數據表（PDF） - Integrated Circuit Systems

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ICS94209

Programmable Frequency Generator & Integrated Buffers for Pentium III Processor

Integrated Circuit Systems 

ICS94209

SDRAM_STOP# Timing Diagram

SDRAM_STOP# is an asychronous input to the clock synthesizer. It is used to stop SDRAM clocks for low power operation.

SDRAM_STOP# is synchronized to complete it's current cycle, by the ICS94209. All other clocks will continue to run while

the SDRAM clocks are disabled. The SDRAM clocks will always be stopped in a low state and start in such a manner that

guarantees the high pulse width is a full pulse.

Notes:

1. All timing is referenced to the internal CPU clock.

2. SDRAM is an asynchronous input and metastable conditions may exist. This signal is synchronized to

the SDRAM clocks inside the ICS94209.

3. All other clocks continue to run undisturbed.

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