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參數(shù)資料
| 型號(hào)： | ICS9248YF-195LF-T |
| 英文描述： | Frequency Generator & Integrated Buffers for PENTIUM II/III & K6 |
| 中文描述： | 頻率發(fā)生器 |
| 文件頁(yè)數(shù)： | 13/16頁(yè) |
| 文件大?。?/td> | 160K |
| 代理商： | ICS9248YF-195LF-T |
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ICS9248-195
0375D—02/02/04
CLK_STOP# Timing Diagram
CLK_STOP# is an asychronous input to the clock synthesizer. It is used to turn off the CPU clocks for low power
operation. CLK_STOP# is synchronized by the
ICS9248-195
. The minimum that the CPU clock is enabled (CLK_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.
Notes:
1. All timing is referenced to the internal CPU clock.
2. CLK_STOP# is an asynchronous input and metastable conditions may exist. This signal is
synchronized to the CPU clocks inside the ICS9248-195.
3. SDRAM-F output is controlled by Buffer in signal, not affected by the ICS9248-195
CLK_STOP# signal. SDRAM are controlled as shown.
4. All other clocks continue to run undisturbed.
PCICLK
SDRAM
CPUCLK
CPUCLK _F
SDRAM_F
PCI_STOP# (High)
CLK_STOP#
INTERNAL
CPUCLK
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