Content originally posted in LPCWare by hens on Wed Apr 03 13:34:02 MST 2013
I moved the 1.5K pullup from usb_d+ to usb_d- in order to select 1.5Mbs, low-speed mode. I also modified USBCLKDIV from 1 to 8, to generate 6MHz clock instead of 48MHz. Low-speed USB device is not recognized.
Is there something else that I need to change?
The reason that I want low-speed is that I suspect I might have a signal fidelity issue on my USB path which is causing the problem reported in my previous thread, "LPC11U24 ISP via USB" (a thread without answers). Aaaargggghhhh!