cy28445-5 SpectraLinear Inc, cy28445-5 Datasheet - Page 18

• Manufacturer Part Number: cy28445-5
• Description: Clock Generator For Intel Calistoga Chipset
• Manufacturer: SpectraLinear Inc

Rev 1.1, June 30, 2007
FS_A, FS_B,FS_C
VDD Clock Gen
VTT_PW RGD#
PW RGD_VRM
Clock Outputs
Clock State
Clock VCO
VDD_A = 2.0V
SRC 100MHz
PCI_STP#
Power Off
PCI_F
S0
PCI
State 0
Off
Off
Figure 13. Clock Generator Power-up/Run State Diagram
0.2-0.3mS
Figure 11. PCI_STP# Deassertion Waveform
Tsu
State 1
Delay
Figure 12. VTTPWRGD# Timing Diagram
VDD_A = off
Tdrive_SRC
>0.25mS
Delay
VTT_PW RGD#
S1
W ait for
On
VTT_PWRGD# = toggle
VTT_PWRGD# = Low
Operation
Normal
Sample Sels
State 2
S3
Inputs straps
On
State 3
Sample
Enable Outputs
S2
VTT_PW RGD# is ignored
Device is not affected,
Wait for <1.8ms
CY28445-5
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