10

PS8734A

09/02/04

PI6C410

Clock Generator for Intel

PCI-Express Desktop Chipset

Tristate Specifications

Signal

Pwrdwn

Pwrdwn Tristate Bit

Stoppable

Non-stop

pin

Outputs

Outputs

CPU[0:2], SRC[1:7],

DOT96

0

X

Running

Running

1

0

Driven @ Iref x 2

Driven @ Iref x 2

1

1

Tristate

Tristate

Spread Spectrum Specifications

PI6C410 supports Spread Spectrum clocking and can be enabled and disabled via SMBus control. The maximum Spread Spectrum

Modulation is –0.5% down spread with frequency from 30KHz to 33KHz.

SSC ON

Tperiod

SSC OFF

Tperiod

Unit

Min

Max

Min

Max

ns

CPU @ 399.000MHz

2.4993

2.5133

CPU @ 400.000MHz

2.4993

2.5008

CPU @ 332.500MHz

2.9991

3.016

CPU @ 333.333MHz

2.9991

3.0009

CPU @ 266.000MHz

3.7489

3.77

CPU @ 266.666MHz

3.7489

3.7511

CPU @ 199.500MHz

4.9985

5.0266

CPU @ 200.000MHz

4.9985

5.0015

CPU @ 166.250MHz

5.9982

6.032

CPU @ 166.666MHz

5.9982

6.0018

CPU @ 133.000MHz

7.4978

7.54

CPU @ 133.333MHz

7.4978

7.5023

CPU @ 99.750MHz

9.997

10.0533

CPU @ 100.000MHz

9.997

10.003

SRC @ 99.750MHz

9.997

10.0533

SRC @ 100.000MHz

9.997

10.003

PCIF / PCI @ 33.250MHz

29.991

30.1598

PCIF / PCI @ 33.333MHz

29.991

30.009

Crystal Recommendations

Frequency

Cut

Loading Load Cap

Drive

Max.

Shunt Cap

Max.

Motional

Cap Max.

Tolerance

Max.

Stability

Max.

Aging

Max.

14.31818MHz

AT

Parallel

20pF

0.1mW

5pF

0.016pF

35ppm

30ppm

5ppm

Notes:

1. External trim capacitors (Ce) are required by using this formula Ce = 2*CL – (Cs + Ci). Typical Ce = 33pF when Crystal Load = 20pF, Trace

capacitance (Cs) = 2.8pF and XTAL pins capacitance = 4.5pF.