Using the baseboard standalone in an application?

[lpcware]

Content originally posted in LPCWare by g9010086 on Wed Apr 27 07:19:24 MST 2011
Hi i was wondering if it was possible to use the base board in an application when separated from the LPC-Link?

I have used the Link to initial program and when connected works fine, even when the link is not connected to the laptop by usb it works fine! it just has to be connected.

When removed the application stop working, any ideas?

Thank you,
Luke

[lpcware]

Content originally posted in LPCWare by Rob65 on Wed Apr 27 09:05:49 MST 2011
Luke,

misread your first port ... I thought you used one of the EmbeddedArtists or other baseboards together with the LPCXpresso board.

If you mean one of these LPCXpresso boards with the term "baseboard" like this one:

[IMG]http://www.embeddedartists.com/products/images/xpr_lpc1343_350.jpg[/IMG]

then you need to apply 3.3V to pin 28 of the board.

Have a look at the schematics of this board, on page 1 you will see a design overview showing that the 5V goes from the expansion connector to the LPC-Link processor. From the LPC-Link there is a 3.3V power to the LPC1343.

If you remove the LPC-Link section then you have to provide 3.3V to the  processor since the 5V is not connected to anything at all.
You have to use something like an IRU1117-33 to create the 3V3 (it's an  SMD part but the size is big enough to allow normal soldering).

Rob

[IMG]http://bikealive.nl/img-for-others/LPCXpresso-forum/lpc1343powering.png[/IMG]

[lpcware]

Content originally posted in LPCWare by g9010086 on Wed Apr 27 08:19:21 MST 2011
Thank you for your quick reply, i am only supplying 5V to the EXT power Pin of the LPCXpresso 1768, and no supply is to the 3.3 VIO pin :S whats this about a jumper? or do i have to supply my own 3.3 v?

Thank You,
Luke

[lpcware]

Content originally posted in LPCWare by Rob65 on Wed Apr 27 07:57:04 MST 2011
What baseboard?
Are you sure your board is still working now you have cut the umbilical cord?

The LPC-Link part of the board contains a 5 to 3.3V converter.


Your baseboard has to provide 3.3V to the LPCXpresso board. Check pin 28 of yout LPCXpresso board to be sure there is 3.3V delivered to the board. If you only have 5V on pin 2 then you do have to provide your own 3.3V regulator (or check the schematics if you need to insert a jumper for this).

Been there - Done that ...
I have some board with a 3.3V regulator I had to add after cutting of the LPC-Link.

[lpcware]

Content originally posted in LPCWare by g9010086 on Wed Apr 27 07:23:51 MST 2011
Im guessing the Reset In Pin has to be tied low?
:s