CY28439 SpectraLinear, CY28439 Datasheet - Page 14

• Manufacturer Part Number: CY28439
• Description: Clock Generator
• Manufacturer: SpectraLinear

Rev 1.0, November 21, 2006
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
Power Off
S0
CPUC, 133MHz
CPUT, 133MHz
SRCC 100MHz
State 0
Off
Off
SRCT 100MHz
USB, 48MHz
PCI, 33MHz
DOT96C
DOT96T
Figure 7. Clock Generator Power-up/Run State Diagram
REF
Figure 5. Power-down Deassertion Timing Waveform
PD
0.2-0.3mS
State 1
Delay
Figure 6. VTT_PWRGD# Timing Diagram
VDD_A = off
>0.25 ms
Delay
VTT_PW RGD#
S1
W ait for
Tdrive_PWRDN#
<300 s >200mV
<1.8 ms
Tstable
On
VTT_PW RGD# = toggle
VTT_PW RGD# = Low
Operation
Norm al
Sample Sels
State 2
S3
Inputs straps
On
State 3
Sample
Enable Outputs
S2
VTT_PW RGD# is ignored
W ait for <1.8ms
Device is not affected,
www.DataSheet4U.com
CY28439
Page 14 of 21