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FPGA can interfere with bootloader's use of USB on older Cynthions #15

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mossmann opened this issue May 8, 2024 · 1 comment
Open

FPGA can interfere with bootloader's use of USB on older Cynthions #15

mossmann opened this issue May 8, 2024 · 1 comment
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@mossmann
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mossmann commented May 8, 2024 •
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This affects Cynthion r0.1-r0.5.
It should be possible to have Saturn-V hold the Sideband PHY in reset and/or prevent FPGA configuration.
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This is fixed for hardware revisions r0.3 through r0.5 in #16. There is still a problem on r0.1 and r0.2, but we aren't motivated to fix it. For now, Sideband PHY usage is unsupported on r0.1/r0.2.

@mossmann mossmann mentioned this issue May 21, 2024
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@mossmann mossmann added the bug label May 21, 2024
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