W83194BR-640 Просмотр технического описания (PDF) - Winbond

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W83194BR-640

166MHZ CLOCK FOR SIS CHIPSET

Winbond 

W83194BR-640

REF1^/&FS1

24_48MHz#/

&AGPSEL

48MHz ^

PCI clocks.

3

I/O 3.3V, 14.318MHz reference clock output. Internal

120kΩ pull-down.This pin has 1.5X drive strength.

Latched input for FS1 at initial power up for H/W

selecting the output frequency of CPU, SDRAM and

PCI clocks.

23

I/O 24MHz or 48MHz selected by Register.

AGPSEL at initial power up for H/W selecting the

output frequency of AGP clocks. Internal 120KΩ pull-

down.

22

O 48MHz output for USB. This pin has 1.5X drive

strength.

4.5 Power Management Pins

SYMBOL

PIN

AGP_STOP#

29

SDRAM_STOP#

30

PD#

31

CPU_STOP#

32

PCI_STOP#

33

FUNCTION

AGP clock stop control pin.

SDRAM clock stop control pin.

Power Down pin, if PD#=0, all clocks are stopped.

CPU clock stop control pin.

PCI clock stop control pin.

4.6 Power Pins

SYMBOL

VddR

VddAPIC

Vdd

VddC

VddAGP

VddP

VddSD

Vdd48

Vss

PIN

FUNCTION

1

Power supply for REF. 3.3V

48

Power supply for IOAPIC0, 2.5V.

25

Power supply for core logic. 3.3V

41,45

Power supply for CPUCLK1T and CPUCLK0T,

CPUCLK1T, IOAPIC0, 2.5V.

17

Power supply for AGP outputs.

11

Power supply for PCI outputs.

36

Power supply for SDRAM and 48/24MHz outputs.

21

Power supply for 48/24MHz outputs.

4,5,8,14,20,26,46,39,42 Circuit Ground.

Publication Release Date: April. 2001

-5-

Revision 1.0

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