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KC705 Evaluation Board
69
UG810 (v1.3) May 10, 2013
Configuration Options
Configuration Options
The FPGA on the KC705 board can be configured by the following methods:
•
Master BPI (uses the Linear BPI Flash).
•
Master SPI (uses the Quad-SPI Flash).
•
JTAG (uses the USB-to-JTAG Bridge or Download cable). See
for more information
See
7 Series FPGAs Configuration User Guide
for details on configuration modes.
The method used to configure the FPGA is controlled by the mode pin (M2, M1, M0)
settings selected through DIP switch SW13.
lists the supported mode switch
settings.
shows mode switch SW13.
The mode pins settings on SW13 determine if the Linear BPI Flash or the Quad SPI Flash is
used for configuring the FPGA. DIP switch SW13 also provides the upper two address bits
for the Linear BPI Flash and can be used to select one of multiple stored configuration
bitstreams.
shows the connectivity between the onboard non-volatile Flash
devices used for configuration and the FPGA.
To obtain the fastest configuration speed an external 66 MHz oscillator is wired to the
EMCCLK pin of the FPGA. This allows users to create bitstreams that will configure the
Table 1-35:
Mode Switch SW13 Settings
Configuration
Mode
Mode Pins (M[2:0])
Bus
Width
CCLK
Direction
Master SPI
001
x1, x2, x4
Output
Master BPI
010
x8, x16
Output
JTAG
101
x1
Not Applicable
X-Ref Target - Figure 1-39
Figure 1-39:
Mode Switch
UG810_c1_32_120511
SDA05H1SBD
SW13
R401
220
Ω
0.1 W
1%
R402
220
Ω
0.1 W
1%
VCC2V5
FPGA_M2
FPGA_M1
FPGA_M0
FLASH_A25
FLASH_A24
R396
1.21k
Ω
0.1 W
1%
R397
1.21k
Ω
0.1 W
1%
R398
1.21k
Ω
0.1 W
1%
R399
1.21k
Ω
0.1 W
1%
R400
1.21k
Ω
0.1 W
1%
1
2
3
4
5
10
9
8
7
6
GND
ON