ARM SWD headers - Page 1
Forum section: electronics / projects

author: alanambrose
author_rank: Frequent Contributor
timestamp: August 13, 2014, 03:52:30 pm
content: Pah, I don't understand, the standard SWD header seems to be the Samtec FTSH-105-01-L-DV-K. But no-one seems to stock them. What _do_ the ARM community do? Last time I had to order I paid a £16 extra charge for Farnell to ship them in from the US. The main distributors either don't seem to carry them or don't have them in stock. The minor distributors Arrow, Avnet, Verical etc don't seem to want to process orders from Europe. What gives? I'm sure I'm not the only ARM user using these headers.TIA, Alan

author: dannyf
author_rank: Super Contributor
timestamp: August 13, 2014, 04:13:58 pm
content: QuoteI don't think you are.However, you are likely one of those privileged few who insist on using that particular part,ie., it is just a multi-pin connector, low-speed too (relatively speaking).

author: AndyC_772
author_rank: Super Contributor
timestamp: August 13, 2014, 04:20:49 pm
content: IIRC I ordered them from Toby last time I needed some.http://www.toby.co.uk

author: Jeroen3
author_rank: Super Contributor
timestamp: August 13, 2014, 04:35:16 pm
content: I sampled a few from samtec, including cable. The first time I needed them.Now I would order them on eBay.http://www.ebay.nl/sch/i.html?_nkw=FCI+-+20021121-00008C4LF+-+HEADER%2C+VERT%2C+1.27MM%2C+SMT%2C+8WAYYes, they are expensive. But on limit board size much better dan the 2.5mm pitch version, or the wrong polarity single row version.

author: gxti
author_rank: Frequent Contributor
timestamp: August 13, 2014, 05:04:23 pm
content: You don't need that exact part, you just need a header with the same pitch and a similar shroud. I've used this in the past:http://www.digikey.com/product-search/en?KeyWords=1175-1629-NDPersonally, I don't use any header at all on my target boards, I use this:http://www.tag-connect.com/TC2030-CTX-NL

author: MagicSmoker
author_rank: Super Contributor
timestamp: August 13, 2014, 05:15:38 pm
content: Quote from: gxti on August 13, 2014, 05:04:23 pmI second this recommendation. I switched over to the tag-connect pogo pin adapters a few years ago and haven't looked back.

author: JDubU
author_rank: Frequent Contributor
timestamp: August 13, 2014, 07:30:13 pm
content: Quote from: MagicSmoker on August 13, 2014, 05:15:38 pmHave you used the "No Leg" version? Does it make reliable connections?

author: jmag999
author_rank: Contributor
timestamp: August 13, 2014, 07:58:44 pm
content: The no-leg versions are ok for occasional debug, especially if you get the clip that holds it in place. But I don't like them for long term debugging. The can fall off, and it's easy to lose the clip. Good for small scale production though.

author: alanambrose
author_rank: Frequent Contributor
timestamp: August 14, 2014, 04:32:18 pm
content: Thanks for the tips - interesting re the tag-connect, a bit ugly but I guess it saves space. Still can't see why the actual parts are so bloody precious given that presumably arm and samtec hatched a deal for the standard.Alan

author: zapta
author_rank: Super Contributor
timestamp: August 14, 2014, 04:47:58 pm
content: Quote from: alanambrose on August 14, 2014, 04:32:18 pmI looked at it once and it doesn't save much space compared to 2x3 0.1" header footprint and pogo pins.

author: philpem
author_rank: Frequent Contributor
timestamp: August 14, 2014, 08:53:56 pm
content: The problem I've had with the "locking" Tag-Connect headers is that after a few insertions (or a ham-handed technician getting hold of your prototype to "check something") the locking clips tend to break off.

author: MagicSmoker
author_rank: Super Contributor
timestamp: August 14, 2014, 11:40:32 pm
content: Quote from: JDubU on August 13, 2014, 07:30:13 pmYes, the no-leg version makes a reliable connection but you do have to hold it in place. Each pin is spring-loaded so alignment isn't too critical.