This section gives an overview of the RealView Logic Tile header connectors on the PB926EJ-S. For more detail, see the documentation for your RealView Logic Tile.
There are three headers on the top and bottom of the tile. The HDRX and HDRY headers are 180-way and the HDRZ connectors are 300-way.
There is a limit to the number of RealView Logic Tiles which can be stacked on a RealView baseboard. For the PB926EJ-S the recommended limit is two.
When stacking tiles ensure that the power source can maintain the required voltage at the top tile when supplying maximum current to the system. If necessary, use a seperate bench supply or power the system from a PCI backplane. See Table B.3 for further details.
The FPGA signals on a RealView Logic Tile and the PB926EJ-S are fully programmable. Ensure that there are no clashes between the signals on the tiles or with the signals from the PB926EJ-S.
The FPGA can be damaged if several pins configured as outputs are connected together and attempt to output different logic levels.
Figure F.3 shows the pin numbers and power-blade usage of the HDRX, HDRY, and HDRZ headers on the upper side of the tile. See RealView Logic Tile header connectors for details of the signals on the PB926EJ-S header connectors.