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Spartan-3A DSP 3400A Edition User Guide
UG498 (v2.2) November 17, 2008
Chapter 1:
Introduction
R
33.
Configuration DIP Switches
Eight configuration DIP switches (S2) allow you to configure the System ACE
configuration address and the FPGA configuration mode, as well as to enable the
fallback configuration of the board's System ACE configuration.
Table 1-24:
Configuration DIP Switch Functions
Switch No.
Function
On Position Off Position
8
System ACE Config address [2]
0
1
7
System ACE Config address [1]
0
1
6
System ACE Config address [0]
0
1
5
Config Mode [2] (see
Table 1-25
)
0
1
4
Config Mode [1] (see
Table 1-25
)
0
1
3
Config Mode [0] (see
Table 1-25
)
0
1
2
Board flash memory fallback
0 (Disabled)
1 (Enabled)
1
System ACE configuration
When the System ACE configuration is
enabled, the System ACE controller (on the
bottom of the board) configures the FPGA from
the CompactFlash card reader (on the bottom
of the board) whenever a CompactFlash card is
inserted in the reader or the Reset ACE button
is depressed.
0 (Disabled)
1 (Enabled)
Table 1-25:
Configuration Modes
Configuration Mode
Configuration Source
Mode [2]
Mode [1]
Mode [0]
MASTER SERIAL
CONFIG FROM
XCF32P FLASH
0
0
0
MASTER SPI
CONFIG FROM SPI
EEPROM
0
0
1
MASTER BPI-UP
NOT SUPPORTED
0
1
0
MASTER BPI-DOWN
NOT SUPPORTED
0
1
1
MASTER
SELECTMAP
CONFIG FROM
XCF32P FLASH
1
0
0
JTAG
CONFIG FROM
SYSTEMACE
1
0
1
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