Are USB2.0 programmers (SP6100 series) downward compatible with USB 1.1? Updated on September 29, 2015 By admin Comments Off on Are USB2.0 programmers (SP6100 series) downward compatible with USB 1.1? Author: admin No, SP6100 series programmers such as SP6100, SP611S, SP610P and SP6104GP are required for USB 2.0 and up. Was this answer helpful ? Yes (0) / No (0) By admin