A Xilinx PROM file consists of one or more data streams. In this context, a data stream represents all the configuration data required to implement a given application. Each data stream contains one or more BIT files and once saved, will have a separate preamble and length count. The “Configuration Data Streams” figure illustrates the structure of a PROM file.
The PROM file can be formatted in one of three industry standard formats: Intel MCS-86®, Tektronix TEKHEX, and Motorola EXORmacs.
You can also format BIT files into a HEX format file. This file type is not considered a PROM file since you cannot use it to program PROM devices. A HEX format file is ordinarily used as input to user-defined programs for microprocessor downloads.
You can store PROM files in PROM devices or on your computer. In turn, you can use the files to program your FPGA devices either from a PROM device on your board or from your computer using a serial or parallel cable. Refer to the Hardware Debugger Reference/User Guide for more information.
Figure 1.2 Configuration Data Streams |  |
