ICS94211 データシートの表示（PDF） - Integrated Circuit Systems

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ICS94211

Programmable System Frequency Generator for PII/III™

Integrated Circuit Systems 

ICS94211

PCI_STOP# Timing Diagram

PCI_STOP# is an asynchronous input to the ICS94211. It is used to turn off the PCICLK clocks for low power operation. PCI_STOP#

is synchronized by the ICS94211 internally. The minimum that the PCICLK clocks are enabled (PCI_STOP# high pulse) is at least

10 PCICLK clocks. PCICLK clocks are stopped in a low state and started with a full high pulse width guaranteed. PCICLK clock on

latency cycles are only one rising PCICLK clock off latency is one PCICLK clock.

Notes:

1. All timing is referenced to the Internal CPUCLK (defined as inside the ICS94211 device.)

2. PCI_STOP# is an asynchronous input, and metastable conditions may exist. This signal is required to be synchronized

inside the ICS94211.

3. All other clocks continue to run undisturbed.

4. CPU_STOP# is shown in a high (true) state.

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