W83L197R-16 데이터 시트보기 (PDF) - Winbond

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W83L197R-16

2-CHIP 100MHZ CLOCK FOR BX NOTEBOOK

Winbond 

W83L197R-16

5.0 PIN DESCRIPTION

IN - Input

OUT - Output

I/O - Bi-directional Pin

# - Low active

* - Internal 250kΩ pull-up

5.1 Crystal I/O

SYMBOL

PIN

Xin

1

Xout

2

PRELIMINARY

I/O

IN

OUT

FUNCTION

Crystal input with internal loading capacitors and

feedback resistors.

Crystal output at 14.318MHz nominally.

5.2 CPU, PCI Clock Outputs

SYMBOL

CPUCLK0

CPUCLK1

PIN

24,23

PCICLK [ 1:5 ]

PCICLK_F

PCI_STOP#

5,7,8,10,11

4

19

CPU_STOP#

18

I/O

OUT

OUT

FUNCTION

Low skew (< 250ps) clock outputs for host

frequencies such as CPU, Chipset and Cache.

VddC is the supply voltage for these outputs.

Low skew (< 250ps) PCI clock outputs.

I/O PCI_STOP# input used in power management mode

for synchronously stopping the all CPU clocks.

I/O this pin is CPU_STOP # and used in power

management mode for synchronously stopping the

all PCI clocks.

5.3 Fixed Frequency Outputs

SYMBOL

PIN

SEL100/66#

15

REF2X / FS0*

26

48MHz/SPREAD*

16

I/O

FUNCTION

IN CPU clock frequency select pin.

I/O Internal 250kΩ pull-up.

Latched input for FS0* to chose frequencies at initial

power up.

Reference clock during normal operation.

I/O Internal 250kΩ pull-up.

48MHz output for USB during normal operation.

Latched input for SPREAD* to select the spread

spectrum spend at initial power up.

Publication Release Date: Mar. 1999

-3-

Revision 0.10

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