Digilent 410-044-10P-KIT - Manual (Page 38)

Spartan-3 Starter Kit Board User Guide www.xilinx.com 38
UG130 (v1.1) May 13, 2005 1-800-255-7778
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Chapter 10
Platform Flash Configuration Storage
The Spartan-3 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
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
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.
“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.
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Table 10-1: Jumper JP1 Controls the Platform Flash Options
Option
Jumper JP1
Setting
Description
Default The FPGA boots from Platform Flash. No additional data storage is available.
Flash Read The FPGA boots from Platform Flash, which is permanently enabled. The FPGA
can read additional data from Platform Flash.
Disable Jumper removed. Platform Flash is disabled. Other configuration data source
provides FPGA boot data.
JP1
JP1
JP1