topic Re: Minimal SWD Connection LPC-Link2 in LPCXpresso IDE

Minimal SWD Connection LPC-Link2

lpcware — Thu, 16 Jun 2016 02:14:29 GMT

Content originally posted in LPCWare by R2D2 on Fri Jun 14 06:55:06 MST 2013
Since LPC-Link requires a minimal connection of 4 wires (J4: SWDIO, SWDCLK, Reset, GND), LPC-Link2 isn't working with 4 wires (J6: SWDIO, SWDCLK, Reset, GND).

EA isn't supporting me with an official schematic, so I've to use the unofficial.

Does Link2 need any other connections? SWO?

Re: Minimal SWD Connection LPC-Link2

lpcware — Thu, 16 Jun 2016 02:14:29 GMT

Content originally posted in LPCWare by R2D2 on Fri Jun 14 12:00:42 MST 2013

Quote: R2D2
Does Link2 need any other connections? SWO?

Got an official answer from my support:

Quote:
Nö, einfach JP2 schliessen.

Re: Minimal SWD Connection LPC-Link2

lpcware — Thu, 16 Jun 2016 02:14:30 GMT

Content originally posted in LPCWare by R2D2 on Sat Jun 15 03:48:12 MST 2013
After several tests we decided to add R38 (1k / 402). That's supplying enough current to use Link2 without JP2 and also without external supply from target.

So a simple 4-wire SWD connection is working without problems with LPC-Link2 (just as LPC-Link) and a 'full' SWD connection via 10pin Cable to a self powered target is also possible.

Thanks to all who helped to solve this (Mike, who dug out the unofficial schematic http://knowledgebase.nxp.com/showthread.php?t=4617 and last not least my favorite forum ex-members...)