Data Exchange

PADS I/O Designer allows you to exchange a wide variety of design data with external systems such as HDL Entry tools, Synthesis tools, Place & Route tools and Design Definition tools. This chapter describes this data exchange in detail.

• "HDL and EDIF/XML Files"

• "Synthesis Constraints Files"

• "Place and Route Constraints Files"

• "FPGA Xchange Files"

• "Integration with PADS Designer"

• "Integration with Pads Layout"

• "Constraints Bus Members Generation"

Note
	Before generating a file, its name must be entered in the Database Properties dialog.

Whenever possible, PADS I/O Designer does not overwrite the contents of an existing file. For instance, if a constraints file is generated, and the file already exists, the file is read, modified to reflect the current pin assignments, and then written back. In other words, PADS I/O Designer preserves constraints created by external tools.