Content originally posted in LPCWare by micrio on Fri Aug 03 05:48:18 MST 2012
The pull-up and pull-down are not actually resistors, they are current sources.
It is listed as 50 uA pull-down and -50uA pull-up. This is listed in Table 7,
static characteristics, of the data sheet. The data sheet has information
not listed in the user guide.
Pete.