W83194BR-KX Просмотр технического описания (PDF) - Winbond

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W83194BR-KX

STEP-LESS 3-DIMM K7 CLOCK

Winbond 

W83194BR-KX

PRELIMINARY

4.3 I2C Control Interface

SYMBOL

PIN

*SDATA

23

*SDCLK

24

I/O

FUNCTION

I/O Serial data of I2C 2-wire control interface with internal

pull-up resistor.

IN Serial clock of I2C 2-wire control interface with

internal pull-up resistor.

4.4 Fixed Frequency Outputs

SYMBOL

PIN

REF0/ *FS4

2

REF1 / *FS0

48

24_48MHz / *FS3

25

48MHz / *FS2

26

I/O

FUNCTION

I/O 14.318MHz reference clock.

Latched input for FS4 at initial power up for H/W

selecting the output frequency of CPU, SDRAM and

PCI clocks

I/O 14.318MHz reference clock.

Latched input for FS0 at initial power up for H/W

selecting the output frequency of CPU, SDRAM and

PCI clocks.

I/O 24MHz output clock.

Latched input for FS3 at initial power up for H/W

selecting the output frequency of CPU, SDRAM and

PCI clocks.

I/O 48MHz output for USB during normal operation.

Latched input for FS2 at initial power up for H/W

selecting the output frequency of CPU, SDRAM and

PCI clocks.

4.5 Power Pins

SYMBOL

Vddq2

Vddq3

Vss

PIN

FUNCTION

42

Power supply for CPU clocks, 2.5V or 3.3V.

1,6,14,19,27,30,36 Power supply for PCI, 24_48MHz, SDRAM [0:12], and

CPU PLL core, nominal 3.3V.

3,9,16,22,33,39,45, Circuit Ground.

47

Publication Release Date: May 2000

-4-

Revision 0.42

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