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A core which uses BSCAN_SPARTAN3 primitive to transfer a configuration bit-stream from JTAG to SPI.
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README
XC3S50AVQ100.ucf
bscan_spi.bit A compiled bit-stream for XC3S50AVQ100 chip is added. Jul 30, 2017
bscan_spi.vhd

README

A core which uses BSCAN_SPARTAN3 primitive to transfer a configuration bit-stream from JTAG to SPI.
It should be used in pair with "fireprog" (also Papilio-Loader) software to program SPI flash memory, connected to the Spartan 3 chip.
Constraints were adapted for the Prometheus FPGA board which has an M25PE10 SPI flash connected to a Spartan 3A in a VQ100 package.
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