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AR# 38913

DCI Cascading - Can there be more than one master bank in a column?

Description

Can there be more than just one master bank in a column?

Solution

Yes, there can be more than one master/slave combination per column.

There needs to be a DCI_CASCADE XDC/UCF constraint for each master/slave grouping. 

For example, for a given device, if banks 11, 12, 13, 14 , and 15 are adjacent banks in one column and banks 11, 12 and 13 are compatible (meaning they have the same VCCO, VREF and adhere to DCI I/O banking compatibility rules), but banks 14 and 15 do not (but are compatible with each other), then banks 11, 12 and 13 can be one master/slave grouping and banks 14 and 15 can be another master slave grouping.

XDC

set_property dci_cascade {11} [get_iobanks 12 13]
set_property dci_cascade {14} [get_iobanks 15]

UCF

CONFIG DCI_CASCADE = "11 12 13";
CONFIG DCI_CASCADE = "14 15";

AR# 38913
Date 04/05/2017
Status Active
Type General Article
Devices
  • Virtex-5 LX
  • Virtex-5 FXT
  • Virtex-5 LXT
  • More
  • Virtex-5 SXT
  • Virtex-5 TXT
  • Virtex-5Q
  • Virtex-5QV
  • Virtex-6 CXT
  • Virtex-6 HXT
  • Virtex-6 LX
  • Virtex-6 LXT
  • Virtex-6 SXT
  • Less