lpcware

LPC17xx - Input PullUP / PullDown / Weak or Strong - Current values

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by rnj on Mon May 25 14:54:36 MST 2015
Hello!!!

I'm looking for the values of the weak pull-ups when the LPC1768 is on default state. Looking on datasheet I found values for current on theses pins, Ipd and Ipu, but the datasheet doesn't make it clear if these values are for strong or weak PU/PD.

Another doubt is that in the page 75 the diagram show the Pin schematic and the source of the PU/PD are VDD, but in the page 20 the note [1] there is another information about pull-ups values of 2.3V to 2.6V. I measured this same value in my Board.

Are these values right? During the MCU reset these GPIOs are configured as Input Pull-up, so can I consider the "weak" configuration? These currents of Ipd and Ipu are for Weak or Strong PU/PD? Or should I consider the current showed in the page 55 on Fig 14? Which is right?

Thank you!

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