User guide

140 www.xilinx.com Spartan-6 FPGA Configuration User Guide
UG380 (v2.7) October 29, 2014
Chapter 8: Readback CRC
CLBs Near Top or Bottom IOI Using DRP
Using IOI with DRP requires additional masking because the IOI configuration data is
now reconfigurable during user operation. The organization of the IOI data in frames also
encompasses the 14 adjacent CLBs shown in Figure 8-2.
X-Ref Target - Figure 8-2
Figure 8-2: CLB Masking with IOI DRP Enabled
Top IOI
With
DRP
SLICEM
SLICEL
SLICEX
14 CLBs
Associated with
Top and Bottom IOI
14 CLBs
Associated with
Top and Bottom IOI
DRP Masking Impacts
Frames Containing:
SLICEM and SLICEX (shown left), or
SLICEL and SLICEX (shown right)
SLICEM FramesSLICEX Frames
LUT6 LUT6
LUT6
LUT6LUT6
LUT6
LUT6LUT6
Top IOI
With
DRP
Top IOI
With
DRP
Top IOI
With
DRP
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