ics9248-199 Integrated Device Technology, ics9248-199 Datasheet - Page 17

• Manufacturer Part Number: ics9248-199
• Description: Frequency Generator For Sis 735/740 With Amd K7 Processor
• Manufacturer: Integrated Device Technology

(CPU_STOP# high pulse) is 100 CPU clocks. All other clocks will continue to run while the CPU clocks are disabled.
The CPU 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. CPU clock on latency is less than 4 CPU clocks and CPU clock off latency is less than 4 CPU clocks.
CPU_STOP# Timing Diagram
CPU_STOP# is an asychronous input to the clock synthesizer. It is used to turn off the CPU clocks for low power
operation. CPU_STOP# is synchronized by the ICS9248-199. The minimum that the CPU clock is enabled
0376E—12/23/02
Notes:
1. All timing is referenced to the internal CPU clock.
2. CPU_STOP# is an asynchronous input and metastable conditions may exist. This signal is
3. All other clocks continue to run undisturbed.
synchronized to the CPU clocks inside the ICS9248-199.
CPU_STOP#
INTERNAL
PD# (High)
CPUCLKT
CPUCLKC
CPUCLK
PCICLK
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ICS9248-199