topic Re: Minimal SWD Connection in LPC Microcontrollers

Minimal SWD Connection

lpcware — Wed, 15 Jun 2016 17:08:14 GMT

Content originally posted in LPCWare by LabRat on Wed Feb 26 11:37:52 MST 2014
I'm just drawing a few new LPC15 boards and would like to know if Reset is required for LPCXpresso V7 and LPC-Link2?

We know Reset is required for LPC17xx and not required for LPC11xx, but what about LPC15xx?

Re: Minimal SWD Connection

lpcware — Wed, 15 Jun 2016 17:08:14 GMT

Content originally posted in LPCWare by LabRat on Thu Mar 06 10:55:42 MST 2014
Answering my own question:

Yes, Reset is required. So minimal LPC15xx SWD connection is SWDIO, SWCLK, Reset, GND.

Re: Minimal SWD Connection

lpcware — Wed, 15 Jun 2016 17:08:15 GMT

Content originally posted in LPCWare by mc on Mon Mar 24 14:27:46 MST 2014
Hi LabRat,
Yes, that way you can always reset before connecting to device.

Re: Minimal SWD Connection

lpcware — Wed, 15 Jun 2016 17:08:16 GMT

Content originally posted in LPCWare by LabRat on Mon Mar 24 15:19:38 MST 2014

Quote: mc
Yes, that way you can always reset before connecting to device.

:quest:

And why isn't LPC11xx & LPC_Link2 using Reset?

Re: Minimal SWD Connection

lpcware — Wed, 15 Jun 2016 17:08:16 GMT

Content originally posted in LPCWare by bobi-one on Tue Mar 25 00:40:24 MST 2014
Is TRST pin used as well for debugging?

Re: Minimal SWD Connection

lpcware — Wed, 15 Jun 2016 17:08:17 GMT

Content originally posted in LPCWare by LabRat on Tue Mar 25 01:33:48 MST 2014

Quote: bobi-one
Is TRST pin used as well for debugging?

Quote: LabRat
So minimal LPC15xx SWD connection is [color=#f00]SWDIO, SWCLK, Reset, GND[/color].

Obviously not for SWD...