14

ICS950805

0649H—02/25/05

All 3V66 clocks are to be in pphase with each other. In the case where 3V66_1 is configured as 48MHz VCH clock,

there is no defined phase relationship between 3V66_1/VCH and other 3V66 clocks. The PCI group should lag 3V66

by the standard skew described below as Tpci.

Un-Buffered Mode 3V66 & PCI Phase Relationship

3V66 (1:0)

3V66 (4:2)

3V66_5

PCICLK_F (2:0) PCICLK (6:0)

Tpci

Group Skews at Common Transition Edges: (Un-Buffered Mode)

GROUP

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

3V66

3V66

3V66 (5:0) pin to pin skew

0

500

ps

PCI

PCI

PCI_F (2:0) and PCI (6:0) pin to pin skew

0

500

ps

3V66 to PCI

S3V66-PCI

3V66 (5:0) leads 33MHz PCI

1.5

3.5

ns

1Guarenteed by design, not 100% tested in production.