Keywords: v4.1, ip1_i, serial, high, speed, high-speed, PHY, logical, design environment, rio, rapidio, rapid, io, MGT, 9.1i, ip update, 9.1i
For Virtex-II Pro and Virtex-5 cores, a 1x link is unable to train when connected to a 4x link. It will only occasionally train when connected to a 4x core, unless the 4x Core is forced into 1x mode.