2106 pullups not engaged?

Started by chazeltopman January 4, 2005

In the user manual for the 2106 it states that pins P0.29-31 have internal pullups. If I
scope the line and drive it low only and then let it float high, my signal levels stay between
0 and about 2.2 volts. I expected the pullups to pull it up to VDD. Is there a setting in a
register for this? Or is there really not a pullup?


An Engineer's Guide to the LPC2100 Series