Hardware User Guide— 3.1i 4-1
Chapter 4
CPLD Design Demonstration Board
The CPLD Design Demonstration Board (Part Number : HW-CPLD-
DEMOBD) is a tool used for demonstrating the In-System Program-
ming (ISP) capabilities of the XC9500 CPLD family. Using this board,
you can easily program, erase, verify, and functionally test any
XC9500 device.
This chapter contains the following sections:
• “Demonstration Board Overview”
• “Demonstration Board Schematics”
• “Foundation Design Tutorial”
Demonstration Board Overview
The following section details the features and support for the CPLD
Demonstration Board.
The demonstration board uses a surface-mounted 555 timer, with
resistor and capacitor values set for 14 Hz operation. This oscillator
clocks a simple test design (a Johnson counter) implemented in the
XC9536; this counter drives LEDs used to verify operation.
Software and Download Cable Support
The CPLD Demonstration Board is shipped with two short "ribbon"
style cables for device configuration. The board also supports the
Parallel Cable III and the XChecker (serial) cables.
Make sure to connect the cables properly to your host and target
system. For information on connecting cables and powering up the
demonstration board, refer to the “Cable Hardware” chapter.
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