参数资料
型号: ICS9148YF-12
元件分类: 时钟产生/分配
英文描述: 66.6 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48
封装: 0.300 INCH, SSOP-48
文件页数: 3/18页
文件大小: 476K
代理商: ICS9148YF-12
11
ICS9148-12
PD# Timing Diagram
The power down selection is used to put the part into a very low power state without turning off the power to the
part. PD# is an asynchronous active low input. This signal is synchronized internal by the ICS9148-12 prior to its
control action of powering down the clock synthesizer. Internal clocks will not be running after the device is put in
power down state. When PD# is active (low) all clocks are driven to a low state and held prior to turning off the VCOs
and the Crystal oscillator. The power on latency is guaranteed to be less than 3mS. The power down latency is less
than three CPUCLK cycles. PCI_STOP# and CPU_STOP# are don’t care signals during the power down
operations.
Notes:
1. All timing is referenced to the Internal CPUCLK (defined as inside the ICS9148 device).
2. PD# is an asynchronous input and metastable conditions may exist. This signal is synchronized inside the ICS9148.
3. The shaded sections on the VCO and the Crystal signals indicate an active clock is being generated.
Notes:
1. All timing is referenced to the Internal CPUCLK (defined as inside the ICS9148 device.)
2. PCI_STOP# is an asynchronous input, and metastable conditions may exist. This signal is required to be synchronized
inside the ICS9148.
3. All other clocks continue to run undisturbed.
4. PD# and CPU_STOP# are shown in a high (true) state.
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