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Chapter 10
Platform Flash Configuration Storage
The Spartan ? -3 FPGA Starter Kit board has an XCF02S serial configuration Flash PROM to
store FPGA configuration data and potentially additional non-volatile data, including
MicroBlaze application code. To configure the FPGA from Platform Flash memory, all
three jumpers must be installed on the J8 header, indicated as 16 in Figure 1-2 .
Platform Flash Jumper Options (JP1)
The Platform Flash has three optional settings controlled by the JP1 jumper, which is
located in the upper right-hand corner of the board, adjacent to the Platform Flash
configuration PROM. The JP1 jumper is indicated as 3 in Figure 1-2 . A detailed
schematic is provided in Figure A-4 . Table 10-1 summarizes the available options, which
are described in more detail below.
Table 10-1:
Jumper JP1 Controls the Platform Flash Options
Option
Default
Flash Read
Disable
Jumper JP1
Setting
JP1
JP1
JP1
Description
The FPGA boots from Platform Flash. No additional data storage is available.
The FPGA boots from Platform Flash, which is permanently enabled. The FPGA
can read additional data from Platform Flash.
Jumper removed. Platform Flash is disabled. Other configuration data source
provides FPGA boot data.
“Default” Option
For most applications, this is the default jumper setting. As shown in Figure 10-1 , the
Platform Flash is enabled only during configuration when the FPGA’s DONE pin is Low.
When the DONE pin goes High at the end of configuration, the Platform Flash is disabled
and placed in low-power mode.
Spartan-3 FPGA Starter Kit Board User Guide
UG130 (v1.2) June 20, 2008
www.xilinx.com
38
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