Digilab_XCRP_Reference_Manual-1 - d igilent, inc. Design...

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digilent, inc. Design Resources for Digital Engineers | www.digilentinc.com 125 SE High Street | Pullman, WA 99163 | (509) 334-6306 (Voice and Fax) © Digilent, Inc., 2002 Document: 502-021 Digilab XCRP Reference Manual Revision: August 30, 2002 Overview The Digilab XCRP (XCRP) circuit board featuring the Xilinx CoolRunner XC3064 CPLD provides a very low cost platform that can be used to implement a wide variety of digital circuits, from complex combinational devices to sequential machines and controllers. The XCRP board provides an ideal platform for new engineers requiring experience with basic digital design techniques, as well as those needing exposure to Xilinx CAD tools and CPLD devices. XCRP board features include: A socketed Xilinx XCR3064 CPLD; Non-volatility – designs remain in the CPLD after power is removed; On board voltage regulator for use with a wall-plug transformer, or the board can run more than 60hrs on 2 AA cells (typical); Expandability –an integral solderless breadboard allows expansion circuits to be constructed right on the XCRP board; An user-adjustable oscillator circuit (approximately 0.5Hz to 4KHz); JTAG programming using a standard parallel cable (included); Two high-bright seven segment displays; Four debounced buttons; Eight slide switches; Eight LEDs in three colors (red, green, and yellow); 40-pin expansion connector. The DXCR board makes an excellent platform for instructional-lab based work: it is fully compatible with all versions of the Xilinx CAD tools, including the free WebPack tools available at the Xilinx website; the included CPLD uses non-volatile configuration memory, so designs can be completed outside the lab; and the board ships with a programming cable and a power source, so designs can be implemented immediately without the need for any additional hardware. Adjustable clock (0.5Hz to 4KHz) 2 AA cells Expansion Connector JTAG port Parallel Port 8 LEDs 2 7-seg. displays 8 switches 4 buttons External power Vcc Debounce Xilinx XCR3064 CoolRunner CPLD PC44 Solderless breadboard Figure 1. XCRP circuit board block diagram
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Digilab XCRP Reference Manual Digilent, Inc. Rev: Apr 1, 2002 www.digilentinc.com Page 2 of 7 Functional description The XCRP board has been designed to offer a low-cost system for designers who need a flexible platform to gain exposure to the basics of digital design or to CPLD devices. The XCRP board provides sufficient I/O devices so that many interesting circuits can be implemented without the need for any other devices. All CPLD signals are routed to an expansion connector so that designs can easily be extended using the on-board solderless breadboard, or by attaching accessory boards. The board can run on two AA cells, so designs are portable. It includes a XCR3064 CoolRunner CPLD, a JTAG configuration circuit that uses a standard parallel cable, an user-settable oscillator circuit, and several useful I/O devices. Table 1 shows all signals routed
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This note was uploaded on 10/02/2011 for the course HNRS 1003 taught by Professor Zerba during the Spring '08 term at LSU.

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Digilab_XCRP_Reference_Manual-1 - d igilent, inc. Design...

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