参数资料
型号: ICS94252YFLF-T
厂商: INTEGRATED DEVICE TECHNOLOGY INC
元件分类: 时钟产生/分配
英文描述: 133.33 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48
封装: 0.300 INCH, LEAD FREE, MO-118, SSOP-48
文件页数: 10/19页
文件大小: 136K
代理商: ICS94252YFLF-T
18
ICS94252
0456B—04/12/04
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 ICS94252. The minimum that the CPU clock is enabled (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.
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
synchronized to the CPU clocks inside the ICS94252.
3. All other clocks continue to run undisturbed.
PCICLK
CPUCLK
PD# (High)
PCI_STOP# (High)
CPU_STOP#
INTERNAL
CPUCLK
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