CY28RS400 Cypress Semiconductor, CY28RS400 Datasheet - Page 12

• Manufacturer Part Number: CY28RS400
• Description: Clock Generator for ATI RS400 Chipset
• Manufacturer: Cypress Semiconductor

CY28RS400
FS_A, FS_B,FS_C
VTT_PW RGD#
PW RGD_VRM
0.2-0.3mS
W ait for
Device is not affected,
Sample Sels
VDD Clock Gen
Delay
VTT_PW RGD#
VTT_PW RGD# is ignored
Clock State
State 0
State 1
State 2
State 3
Off
On
Clock Outputs
On
Off
Clock VCO
Figure 10. VTT_PWRGD# Timing Diagram
S2
S1
VTT_PWRGD# = Low
Delay
Sample
>0.25mS
Inputs straps
VDD_A = 2.0V
Wait for <1.8ms
S0
S3
VDD_A = off
Normal
Enable Outputs
Power Off
Operation
VTT_PWRGD# = toggle
Figure 11. Clock Generator Power-up/Run State Diagram
Document #: 38-07637 Rev. *B
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