PI6C104 Ver la hoja de datos (PDF) - Pericom Semiconductor

Número de pieza

componentes Descripción

Lista de partido

PI6C104

Spread Spectrum Clock Synthesizer for Desktop Pentium II

Pericom Semiconductor 

PI6C104

Spread Spectrum Clock Synthesizer

for Desktop Pentium II 111222333444555666777888999000111222333444555666777888999000111222333444555666777888999000111222111222333444555666777888999000111222333444555666777888999000111222333444555666777888999000111222111222333444555666777888999000111222333444555666777888999000111222333444555666777888999000111222111222333444555666777888999000111222333444555666777888999000111222333444555666777888999000111222111222333444555666777888999000111222

Power Management Timing

When MODE = 0, the device supports power management and pin

11 is input PD#. When MODE = 1, this function is not available).

A particular output is enabled only when both the I2C serial

interface and this pin indicate that it should be enabled. The clocks

may be disabled according to the following table in order to reduce

the power consumption. All clocks are stopped in the low state.

All clocks maintain a valid high period on transitions from running

to stopped. The CPU and PCI clocks transition between running and

stopped by waiting for one positive edge on PCI_F followed by a

negative edge on the clock of interest, after which high levels of the

outputs are either enabled or disabled. See Figure 1 below.

PCI_F

PD#

PCI (1:5)

CPU (0:1)

A: Represents one PCI clock wait cycle

B: Represents one CPU clock wait cycle

Figure 1. PD# Timing Diagram

Note:

1. Please note that all clocks can also be individually (asynchronously) enabled or stopped

via the 2-wire I2C control interface. In this case all clocks are stopped in the low state.

A

B

239

PS8164B 03/15/99

Share Link: