Virtex 4 : Configuration-memory readback

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Hi, I need to perform configuration-memory readback on an active (not shutdown)
virtex 4 device.

Does anyone know if on Virtex 4 is it still the case that readback should not be
performed on active devices, for frames that are prior to memory element frames?
For Virtex 2 and Spartan 3 this can lead to configuration memory corruption. The
Virtex 4 documentation is unclear on this point.

Thanks, Vivian

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