LPCXpresso IDEのトピックRe: SWD connections?

SWD connections?

lpcware — Thu, 16 Jun 2016 02:18:14 GMT

Content originally posted in LPCWare by micrio on Thu Apr 22 19:42:54 MST 2010
The latest LPC111x user manual, rev 00.12, says that only two connections are necessary for the SWD interface. They are SWCLK and SWDIO and ground, of course.

However the shematic for the LPCXpresso board show those connections and two more. RESET with a 12K resistor pull-up is connected and SWO is connected to pin 29. There is a note that says "SWO does not exist on LPC1114", but is is connected never the less.

Do those additional lines serve some function? Is there a reason to connect them if the pins are not otherwise needed?

Re: SWD connections?

lpcware — Thu, 16 Jun 2016 02:18:15 GMT

Content originally posted in LPCWare by igorsk on Fri Apr 23 05:15:47 MST 2010
SWO is used on LPC13xx, and the same board layout is used for both chips.

Re: SWD connections?

lpcware — Thu, 16 Jun 2016 02:18:16 GMT

Content originally posted in LPCWare by micrio on Fri Apr 23 07:59:28 MST 2010
The question that I have; is there any value in connecting the RESET line on a LPC111x series chip?

Re: SWD connections?

lpcware — Thu, 16 Jun 2016 02:18:16 GMT

Content originally posted in LPCWare by CodeRedSupport on Fri Apr 23 10:57:14 MST 2010

Quote: micrio
The question that I have; is there any value in connecting the RESET line on a LPC111x series chip?

The LPCXpresso IDE has reason to pull RESET under certain circumstances. Please connect it.

Regards,

CodeRedSupport