DS-FND-BSX-PC Xilinx Inc, DS-FND-BSX-PC Datasheet - Page 84

• Manufacturer Part Number: DS-FND-BSX-PC
• Description: FOUNDATION BASE SYS W/SYN EXPRES
• Manufacturer: Xilinx Inc
• Type: Foundation Systemr

Specifications of DS-FND-BSX-PC

• For Use With/related Products: Xilinx Programmable Logic Devices
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 122-1185

Foundation Series 2.1i User Guide
4-4
clear functionality. These high-level components are implemented
using hierarchical macros. A hierarchical macro, a device in the
library that looks like a standard component, is implemented as a
symbol with an underlying schematic or netlist. For example, you can
create an equivalent of a counter by drawing a macro schematic with
only gates and flip-flops. This macro can then be saved and reused in
your designs. All FPGA and CPLD libraries already contain many
hierarchical macros.
Hierarchical designs are very effective with IC designs. In
hierarchical macro schematics, all net names and reference names are
local, which means that you can use the same signal names in
different macros.
The connections between hierarchical macro symbols and the under-
lying schematic is made via hierarchy connectors. Use the Hierarchy
Connector icon (shown below) in the Schematic Editor toolbar to
place hierarchy connectors.
These connectors are converted into hierarchical symbol pins as illus-
trated in the following figure.
Hierarchy connector
becomes a macro pin
X8775
Xilinx Development System