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Spartan-3A DSP 3400A Edition User Guide
UG498 (v2.2) November 17, 2008
Chapter 1:
Introduction
R
Board Parts: Bottom
Figure 1-4
displays the parts on the bottom of the Spartan-3A DSP 3400A Edition board.
Each numbered item in the diagram is followed by a numbered description.
1.
SPI EEPROM
ST Microelectronics M25P16 16-Mb SPI EEPROM. The device can be used to configure
the FPGA or to hold user data. See
Chapter 2, “Configuration Options”
for detailed
information.
2.
DDR2 SDRAM
The Spartan-3A DSP 3400A Edition board is equipped with a single-rank, unregistered
512-MB DDR2 SDRAM. The DDR2 SDRAM is usually a Micron MT8HTF6464HY-53E
or similar. Serial presence detection (SPD) through an I
2
C interface to the memory is
also supported by the FPGA. See DDR2 memory for details.
Table 1-28
identifies the
FPGA pin assignments used for the DDR2 interface.
Note
s:
• Only half the available memory of the DDR2 SDRAM (that is, 256 MB) is available
because of certain limitations.
• The Spartan-3A DSP 3400A Edition board is only tested for DDR2 SDRAM operation
at a data rate of 266 MHz (133 MHz clock rate). Using faster data rates is possible, but
they are untested and not guaranteed.
X-Ref Target - Figure 1-4
Figure 1-4:
Bottom View of Spartan-3A DSP 3400A Edition Board
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