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CY2287
10
Switching Waveforms (continued)
Group A
Group B
1.5V
1.5V
Window Measurement Clarification
Example of SDRAM to 3V66 Skew Measurement (CPU @ 66 or 100 MHz)
SDRAM leads 3V66 by 0.0 ns (500-ps window)
500-ps window
Latest of Group B
Earliest of Group A
CPU Group
3V66 Group
1.5V
1.25V
Window Measurement Clarification
Example of CPU to 3V66 Skew Measurement (CPU @ 66 MHz)
CPU leads 3V66 by 7.5 ns (500-ps window)
8.0-ns window (max)
Latest of 3V66 Group
Earliest of CPU Group
Latest of CPU Group
Earliest of 3V66 Group
7.0-ns window (min)