Hardware User Guide4-2 Xilinx Development SystemThis demonstration board is supported by the JTAG ProgrammerSoftware. For more information about using this software, refer to theJTAG Programmer Guide.Printed Circuit Board (PCB)The Printed Circuit Board is shipped with a 44-pin VQFP XC9536device with two bypass capacitors, 8 LEDs with current limitingresistors, and a header for attaching the download cable.The PCB will accept a DPDT switch or a permanent jumper at loca-tion SW1. The switch is used to connect or disconnect an external DCvoltage from the +5V regulator.Prototyping AreaA prototyping area is included on the PCB. This area has 299 holes (13columns x 23 rows) for attaching additional circuitry. The holes are0.038 inch diameter on 0.10 inch centers. Two pairs of these holes areconnected to + 5V and GND along the left side of the prototypingarea.Power SupplyThe Demonstration Board allows the attachment of an external regu-lated +5V power supply via the pads at J2. If a +5V regulator isinstalled at location U2 with a 22uF (or larger) filter capacitor at C4,an external DC voltage of 7V to 12V can be applied at location J3.You can also install an outer case, battery, 5V regulator, filter capac-itor, and on-off switch on the demonstration board. These powersupply components can be purchased from Digi-Key, as shown in thefollowing table.Table 4-1 Digi-Key Parts ListQuantity Descriptions References Digi-Key PartNumber1 DPDT Switch,right angle.SW1 EG1909
