lpcware

low-speed USB

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
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!

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