On Mon, 17 Jun 2019, Troy Benjegerdes wrote: > Have we documented this tx clock switch register in something with a > direct URL link (rather than a PDF)? The SiFive FU540 user manual PDF is the canonical public reference: https://static.dev.sifive.com/FU540-C000-v1.0.pdf This practice aligns with other SoC vendors, who also release PDFs. The relevant Ethernet documentation, including register maps, is in Chapter 19. - Paul