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W83194BR-B

Stepless Clock Gen. For INTEL Brookdale Chipset

Winbond 

W83194BR-B

STEPLESS CLOCK FOR INTEL BROOKDALE CHIPSET

VTT_PWRGD

26

PD#*

3V66_0

VCH_CLK

31

FS4&

PCICLK_F1^

5

FS0&

PCICLK_F2^

6

FS1&

PCICLK0^

9

ENWD*

10, 11, 12,

15, 16, 17

20, 21, 22

PCICLK [1:6]

3V66_1, 3V66_2,

3V66_3

5.3 I2C Control Interface

IN

IN

OUT

OUT

Power good input signal comes from ACPI with high active. This

3.3V input is level sensitive strobe used to determine FS [4:0] and

MULTISEL0 input are valid and is ready to sample. This pin is high

active.

Power Down Function. This is internal 120K pull up. This is multi-

function pin. When the VTT_PWRGD signal is asserted (this is,

turns from a logical Low to high), the pin will be switched into the

function of power down (PD#).

66MHz or 48MHz outputs selected by I2C register.

INtd120k Latched input for FS4 at initial power up for H/W selecting the

output frequency of CPU 3V66 and PCI clocks. This is internal 120K

pull down.

OUT 3.3V free running PCI clock during normal operation. This pin is with

x1.5 ~ x2 driving strength.

INtd120k Latched input for FS0 at initial power up for H/W selecting the

output frequency of CPU, 3V66 and PCI clocks. This is internal

120K pull down.

OUT 3.3V free running PCI clock outputs. This pin is with x1.5 ~ x2

driving strength.

INtd120k Latched input for FS1 at initial power up for H/W selecting the

output frequency of CPU, 3V66 and PCI clocks. This is internal

120K pull down.

OUT 3.3V free running PCI clock outputs. This pin is with x1.5 ~ x2

driving strength.

IN Latched input for ENWD at initial power up for H/W enable the

watch dog timer. This is internal 120K pull up.

OUT Low skew (< 250ps) PCI clock outputs.

OUT 3.3V output clocks for the chipset.

PIN

Pin Name

Type

Description

27

SDATA*

I/OD

Serial data of I2C 2-wire control interface with internal pull-up

resistor.

28

SCLK*

IN

Serial clock of I2C 2-wire control interface with internal pull-up

resistor.

Publication Release Date: February 2003

-4-

Revision 2.0

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