Comments on: Lightweight USB Host. Part 1 – Motivation.

By: oleg

oleg — Thu, 04 Aug 2011 15:05:37 +0000

MAX3421E has fewer bugs and limitations. Besides, I’m not choosing one over another – I’m working on USB host code for Microchip SIE too.

By: ManisB

ManisB — Thu, 04 Aug 2011 14:35:38 +0000

“Microchip makes several parts with built-in USB serial-interface engine (SIE). There is USB peripheral part or two in PIC18 family…”

Why did you choose the MAX external controller over the built-in Microchip one?

By: Jan van Bodegraven

Jan van Bodegraven — Tue, 12 Apr 2011 20:34:37 +0000

Just managed to buy the Circuit Cellar article as a PDF from their site for $3,00….

By: oleg

oleg — Mon, 23 Nov 2009 01:21:41 +0000

MAX3421E is full/low speed host; it won’t work at high speed. By spec, high speed USB devices shall be capable to fall back to full speed; you can check if your camera works in this mode by connecting it to the PC via full speed hub. Since you are transferring single images, you won’t need high speed anyway.

By: Cepin

Cepin — Sun, 22 Nov 2009 14:19:54 +0000

Hello,
Dou you think that this chip can be capable of connect USB 2.0 Hi-speed webcam. Webcam I think use isochronous transfers to send frames to PC…I need connect USB webcam (Logitech C200 ,UVC class) to Texas DSP.I need transfer only one picture…no video stream. And I hope that writing firmware will be easier because webcam is UVC class…? Thank you

By: oleg

oleg — Fri, 18 Sep 2009 03:21:00 +0000

I don’t think so. The part has been around for quite a while, all bugs are known and documented together with workarounds. My guess for “not recommended” status is that they decided not to fix those bugs and not release the updated version of the part.

By: Tom

Tom — Fri, 18 Sep 2009 02:33:15 +0000

On the MAXIM website page for the MAX3421E, this note is under “Status”:

All versions are Not Recommended for New Designs.

Does this mean there is an issue with this part?

By: Need help to start with USB | keyongtech

Need help to start with USB | keyongtech — Sun, 03 May 2009 23:06:24 +0000

[...] thanks everyone for your replies. I am currently looking into MAX3421E and hoping that the guy at http://www.circuitsathome.com/mcu/pr…usb-hostpart-1 knows what he is doing. Don mentioned ghielectronics: it’s promising, cheap, 16$, but goes to 70$ [...]