Digilent Inc. - Digital Design Engineers' Source: "Digilab XCR"The “all-in-one” XCR Board (XCR) features a 64 macrocell, 1600 gate Xilinx CoolRunner CPLD and several useful I/O devices. The XCR runs on 2 AA batteries, it works seamlessly with Xilinx’s free WebPack tools, and it ships with a programming cable, so designs can be completed anywhere a PC exists with no additional costs. The XCR provides an ideal platform for engineers who want to learn digital design techniques using modern technologies.