14
ICS9250- 10
Group Offset Waveforms
Group Skews at Common Transition Edges: (CPU = 66MHz)
CPU & IOAPIC load (lumped) = 20pf; PCI, SDRAM, 3V66 LOAD (LUMPED) = 30pf.
GROUP
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS
CPU to 3V66
SCPU1-3V66
CPU @ 1.25V, 3V66 @ 1.5V
(Note: 180° offset between CPU & 66MHz
0
500
ps
CPU to SDRAM
SCPU2-SDRAM
CPU @ 1.25V, SDRAM @ 1.5V
(Note: 180° offset between CPU & 66MHz
0
500
ps
3V66 to PCI
S3V66-PCI
3V66 @ 1.5V, PCI @ 1.5V
1.5
4
ns
IOAPIC to PCI
SIOAPIC-PCI
IOAPIC @ 1.25V, PCI @1.5V
0
500
ps
1Guarenteed by design, not 100% tested in production.
Group Skews at Common Transition Edges: (CPU = 100MHz)
CPU & IOAPIC load (lumped) = 20pf; PCI, SDRAM, 3V66 LOAD (LUMPED) = 30pf.
GROUP
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS
CPU to 3V66
SCPU1-3V66
CPU @ 1.25V, 3V66 @ 1.5V
(Note: 180° offset between CPU & 100MHz
0
500
ps
CPU to SDRAM
SCPU2-SDRAM
CPU @ 1.25V, SDRAM @ 1.5V
(Note: 180° offset between CPU & 100MHz
0
500
ps
3V66 to PCI
S3V66-PCI
3V66 @ 1.5V, PCI @ 1.5V
1.5
4
ns
IOAPIC to PCI
SIOAPIC-PCI
IOAPIC @ 1.25V, PCI @1.5V
0
500
ps
1Guarenteed by design, not 100% tested in production.
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