7I92 9
OPERATION
CONFIGURATION
The 7I92 is configured at power up by a SPI FLASH memory. This flash memory
is an 16M bit chip that has space for two configuration files. Since all Ethernet logic on the
7I92 is in the FPGA, a problem with configuration means that Ethernet access will not be
possible. For this reason there is a backup method to recover from FPGA boot failures,
fallback.
FALLBACK
The 7I92 flash memory normally contains two configuration file images, A user
image and a fallback image. If the primary user configuration is corrupted, the FPGA will
load the fallback configuration so the flash memory image can be repaired remotely
without having to resort to switching memories or JTAG programming.
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