2.3.6 External SPI Flash

The SPI Flash memory interfaces with the System Controller's SPI interface and can store the programming images. The System Controller supports devices from vendors like Micron, Winbond, and Spansion.

Fabric SRAM (tLSRAM and tUSRAM) in SPI Flash can be initialized using Plaintext Initialization Data, Authenticated Plaintext Initialization Data, and Authenticated Encrypted Initialization Data.

If the user design does not require the auto-initialization of any large FPGA fabric SRAMs, the tLSRAM parameter is zero. If the user design does not require the auto-initialization of any small FPGA fabric SRAMs (USRAMs), the tUSRAM parameter is zero.