UART3 on lpc40XX parts

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UART3 on lpc40XX parts

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NXP Employee
NXP Employee
Content originally posted in LPCWare by schisanoa on Mon Jan 20 07:48:46 MST 2014
Looking at the DS I see that UART 3 is assigned at too much PIN, U3TX and U3RX are mapped on:

P0.0 and P0.1
P0.2 and P0.3
P0.25 and P0.26
P4.28 and P4.29

in addition UART0 is also mapped on too much PIN,

P0.0 and P0.1
P0.2 and P0.3

I'm using Rev. 2 — 3 July 2013 datasheet downloaded from NXP web site, on the LPC4078 page 4 or 5 days ago.

Has someone an updated datasheet to share with me?

I would also advise the other user that PINMUX application for LPC40xx is affected from this problem, in order to avoid some trouble to someone.

Thanks
Alessio

PS: I've already check the ERRATA docs, but nothing is reported
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NXP Employee
NXP Employee
Content originally posted in LPCWare by schisanoa on Mon Jan 20 08:38:43 MST 2014
I've now receivd the answer from NXP technical support( very fast answer, very efficient)!

I'll report:

Quote:
The pins have multiplexers which allows to connect several functions to a single pin. Which function is active can be selected through the IOCON register. This is explained in the UM (www.nxp.com/documents/user_manual/UM10562.pdf), chapter 'Chapter 7: LPC408x/407x I/O configuration'





Now the problem is only on the PINMUX application. Someone know if it possible to manage the problem on the app?(it is useful if possible)

thanks at all

Alessio
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