ics9248-179 ETC-unknow, ics9248-179 Datasheet - Page 13

• Manufacturer Part Number: ics9248-179
• Description: 633/635/640; Main System Clock
• Manufacturer: ETC-unknow

ICS9248-179
Preliminary Product Preview
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 ICS9248-179. 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 ICS9248-179.
3. All other clocks continue to run undisturbed.
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