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CY28409 Datasheet(PDF) 12 Page - Cypress Semiconductor

Part No. CY28409
Description  Clock Synthesizer with Differential SRC and CPU Outputs
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Maker  CYPRESS [Cypress Semiconductor]
Homepage  http://www.cypress.com
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CY28409 Datasheet(HTML) 12 Page - Cypress Semiconductor

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CY28409
Document #: 38-07445 Rev. *B
Page 12 of 18
FS_A, FS_B
VTT_PWRGD#
PWRGD_VRM
VDD Clock Gen
Clock State
Clock Outputs
Clock VCO
0.2-0.3mS
Delay
State 0
State 2
State 3
Wait for
VTT_PWRGD#
Sample Sels
Off
Off
On
On
State 1
Device is not affected,
VTT_PWRGD# is ignored
Figure 9. VTT_PWRGD# Timing Diagram
VTT_PWRGD# = Low
Delay
>0.25mS
S1
Power Off
S0
VDDA = 2.0V
Sample
Inputs straps
S2
Normal
Operation
Wait for <1.8ms
Enable Outputs
S3
VTT_PWRGD# = toggle
VDDA = off
Figure 10. Clock Generator Power-up/Run State Diagram


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