How important is the value 1.5k for the pull-up? Would another value work, like 2.2K? I see in the spec it's quite serious about the 1.5k value, but doesn't really seem to explain why (other than time to pull-up). Has anyone played with this? I'm assuming the LPC2148 doesn't have internal pullup?
Message
LPC2148, 1.5k pull-up for USB D+
2005-11-18 by seangra