STM32F407G-DISC1 Connectors - Page 1
Forum section: electronics / general

author: rcbuck
author_rank: Frequent Contributor
timestamp: February 04, 2020, 03:15:24 am
content: Does anyone happen to have the STM32F407G-DISC1 board? Does it come with the header pins already soldered in? I see a picture on Mouser that seems to say no. But the picture on Newark Element14 seems to say yes.This is the board that replaced the STM32F4 board.

author: donotdespisethesnake
author_rank: Super Contributor
timestamp: February 04, 2020, 10:25:45 am
content: To me it looks like the Mouser picture has pins soldered, it is just the angle that makes it difficult to see. I've probably got a dozen ST boards, it would be highly unusual for ST to sell a board without pins already fitted.

author: Nominal Animal
author_rank: Super Contributor
timestamp: February 04, 2020, 11:23:20 am
content: The pictures I can find on STM32F407G-DISC1 looks exactly like STM32F4-Discovery that does come with pins soldered in (which I do have), and the two have the exact same MCU (ST32F407VGT6); and theSTM32F4DISCOVERY pagesays that the order code has changed from STM32F4DISCOVERY to STM32F407G-DISC1"with the latest board enhancements", those enhancements not being visible to the casual eye (and are therefore something like minor changes in routing, maybe some decoupling caps changed values, and such).The STM32F4DISCOVERY page also says"Extension header for all LQFP100 I/Os for quick connection to prototyping board and easy probing".The picture I see shown at Mouser for STM32F407G-DISC1 does have the pins soldered in:It looks to be of the very same board shown on theSTM32F4DISCOVERY page:For what it is worth, my STM32F4-DISCOVERY board has a MB997Bcode top right, and looks almost exactly the same. The only differences I can see is that my board has some extra silkscreening codes in the top right corner; and that a tiny resistor or whatever center above the blue button is unpopulated on mine. Otherwise all components seem to be at exactly the same positions. Capacitor C33 on mine is gray (ceramic?) instead of yellow (tantalum?), C43 and C45 are smaller on mine than in the picture; these are the things I think ST refers to by "board enhancements". I tried to be careful, but there is always a minor possibility I might have missed some differences; I'm not including things like the stenciling on top of the STM32F407VGT6 chip (mine has explicit codes, the pictures don't have those). (The reason I am not showing a picture of mine, is that it is still in its blister pack and I don't want to open it yet, but I can't seem to get a good picture of it as my lights glare off the blister pack.)All images a DuckDuckGo image search of "STM32F407G-DISC1" shows me look exactly like the STM32F4DISCOVERY I have, and have their pins soldered in. (The black plastic part of the pin headers are below the board, not on top, except for the 6-pin SWD pins on top left, and 4 ST-Link pins on top right, that are on the top side.)I can't see any images of a STM32F407G-DISC1 that doesnothave the pins soldered in, and the STM32F4DISCOVERY with the same microcontroller, components, features, and ST page, but with different ordering code, definitely has the pins soldered in in the blister pack.I would be complaining to ST and returning the board if STM32F407G-DISC1 came without the pin headers already soldered in.I claim it is safe to assume that the pins do come soldered in.

author: SiliconWizard
author_rank: Super Contributor
timestamp: February 04, 2020, 05:31:43 pm
content: I happen to have a STM32F4-Discovery, and it does have header pins (male, sticking out on both sides) soldered.Of course can't tell whether they changed that with the newer board, but I doubt it.

author: Nominal Animal
author_rank: Super Contributor
timestamp: February 04, 2020, 05:58:49 pm
content: Quote from: SiliconWizard on February 04, 2020, 05:31:43 pmThat's what I wrote, dammit. Plus I even went to the trouble of comparing mine to the images of the later version, and checked the Mouser picture (and it too has pins soldered in, contrary to what rcbuck thought, because the plastic parts are on the underside on the two-row pins).You guys are mean.

author: rcbuck
author_rank: Frequent Contributor
timestamp: February 04, 2020, 06:22:26 pm
content: Thanks everyone for the answers, especially Nominal Animal for the pictures.That means I will not order header pins for the board. I do have female sockets that the board will plug into.

author: Nominal Animal
author_rank: Super Contributor
timestamp: February 04, 2020, 06:35:42 pm
content: (In case you're unsure, I was being hyperbolic and had a tongue in my cheek. My posts are too long, and nobody has time to read 'em, but I'm too stubborn/stupid to write more concisely.)Yup. You can blame me if yours comes without pin headers.By the way, one reason I haven't used mine, is that I don't really see how one could use it on a breadboard, because of the dual rows of pins. Even if you happened to have a breadboard with split rows, the split parts for the inner rows would be beneath the board, making it rather awkward...

author: Brutte
author_rank: Frequent Contributor
timestamp: February 05, 2020, 11:41:48 am
content: Quote from: Nominal Animal on February 04, 2020, 06:35:42 pmYes, same here. Even though it is imperial 0.1", it is solderless-breadboard unfriendly.It has wide edges protruding way over the pinheaders covering adjacent holes in a breadboard. And additionally it does not mate with 2-5-2-5-2 alignment of typical breadboard.The Nucleo-64 is much more breadboard-friendly, because after chopping off inner rows, the outer rows match perfectly into 2-5-2-5-2 breadboards. The inner rows have to be managed with jumpers comming from top of course.

author: rcbuck
author_rank: Frequent Contributor
timestamp: February 05, 2020, 11:27:45 pm
content: Update:I discovered I had a STM32D4-discovery board in a box I had forgotten about. I think I bought it about 5 years ago. It does not have the connectors soldered into the board. However, it did come with the connectors. I now wonder if the updated board has pins soldered in or just comes with the pins. I won't be ordering the newer board as this older one is good enough for the tests I wan to run.QuoteI was going to make up a special PCB for my project so the dual rows don't present a problem. Hopefully I will be able to order the boards next week if China opens back up for business.

author: rcbuck
author_rank: Frequent Contributor
timestamp: March 09, 2020, 09:20:35 pm
content: Update in case anyone is interested. I sent a technical support question to Mouser asking if the connectors were soldered in. After 2 weeks I got an answer from them saying the connectors were not soldered in but were included with the board.I ordered the board last week. It came in and the connectors were already soldered to the board. I guess their tech support people didn't bother to look at one of the boards. The probably looked at the tech info for the original board like one I already had on hand.