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The flash memory has space to store one encrypted or up to two non-encrypted configurations for the Xilinx Virtex-5 FPGA.
S2[1] no longer selects the image defined by the HDRZ signal FLASH_IMAGE but now enables the FPGA to access both memory banks for encrypted bit file support.
To select an encrypted bitfile on the HBI-1072C, set:
ON
OFF
To select a non-encrypted bitfile on the HBI-1072C, set:
OFF
Selects between image 0 and 1.
Table 4.1 shows the FPGA image selection options.
Table 4.1. Image selection for XC5V FPGAs
S2[1] | S2[2] | Flash image used | Image LED | Image base address |
|---|---|---|---|---|
| OFF | OFF | 0 | Unlit |
|
OFF | ON | 1 | Lit |
|
ON | x | 0 encrypted | Lit/Unlit |
|
The positions of the switches have no effect on the flash programming operation, only image selection on power-up.
See Application Note AN128 and Application Note AN170 on the Versatile CD for a description of the example lower and upper FPGA images respectively that are stored in flash when the LT-XC5VLX330 is shipped.
| Copyright © 2007-2011 ARM Limited. All rights reserved. | ARM DUI 0365C |
| PDF version | |
| Home > Configuring the FPGA > Configuring the FPGA from flash |