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thank you Christian,

Iron

no problems with FTDI chips

Iron

designed and evaluate all type of usb types

Iron

Thanks Christian; very informative session

Iron

Thanks Christian

a very enjoyable lecture

of course once that is achieved speed becomes an issue again but in general I want a very 

broad number of clients which the system can be used on

I am building a system were reliable communications trumps raw speed

Good lecture (information overload)

Iron

@Brandon - hub may be self powered and provide up to 500mA per device... if hub is bus powered, the power available to devices will be less...

Iron

Or, am I thinking about this all wrong and combining tiers?  In my case, maybe the explanation is that the hub can draw up to 500mA, which is then dispersed to the various downstream ports as needed?

Iron

I'm not sure if anyone is still montoring this chat, but if so I have a question regarding device powering.  I am having trouble understanding what actually controls the amount of current being delivered on VBUS to any one device.  To provide an example - I am working on a design of a device that has a 4-port hub as the direct connection to the USB host on a PC, and from that there are three devices currently connected.  When all of the devices enumerate as being bus-powered, how much current is actually available from the host?  Does it allow up to 500mA draw regardless of how many devices are actually downstream of the hub, or will it only provide 100mA per downstream device?

Iron

@Brandon - same here... missed the yesterday's lecture and late for today's

Iron

@caa028 I'm actually listening to this one right now, since I missed it yesterday.  Then I'm going to try and listen to today's so that I'm caught up.

Iron

Great to have access to the recorded sessions!

Iron

Missed the live lecture again.

Iron

Thanks Christian; Very informative session

Iron

This may not be the right forum to ask the question, but I like to know your take on Thunderbolt vs USB3.0. Thanks!

Iron

@IvekEngineer: Good work! Thanks for tip about letting the audio buffer fill in the BlogTalkRadio widget. I thought about trying that, then didn't, thinking it might just make things worse.

Iron

Thanks, looking forward to tomorrow.

Iron

Thanks Christian!  Fast-paced but very informative.  Good thing I can review the archive.  ;-)

Iron

As a software engineer, I'm interested in understanding some of the mechanical/electrical specs, but most interested in how the software works.  Looking forward to the next couple of days!

Iron

We have some problem with FTDI (as host) so I'm looking to understand it better for future projects.

Iron

the audio dtopped.

kurb

Iron

Excellent tone and pace. Thank you and see you tomorrow.

Iron

Thanks everyone and I am also looking forward to tomorrow.

Ok.  Thank you very much.  I look forward to the next class.

Iron

I press pause for 5 seconds so I have a buffer - then I don't have any problems.

 

ON USB 3.0, when the HOst and Device agrees to use 3.0, the D+ and D- are effectively unused.

When the audio messes up which is quite often, I just keep hitting the start arrow.

Iron

I was able to follow along. I imagine several people were spending valuable time trying to find the right slide to look at.  I can see the slide numbers on the left side of my screen. A suggestion I have is to verbally identify each slide with its slide number and title. An example would be to say  "On slide 14 titled Bus states, it talks about the keep alive signal ....". 

  Anyway, that was the fastest class I've ever been through, and I think you did a good job of presenting the material. Thankyou

Iron

On version 3.0 is the D+ and D- unsed for data or just the new bi-direcitonal path?

Iron

Vbus is 5V but supply voltage can fall to 4.35V at the device.

@Christian: no problem, we all make typos, although a "goad" to drive us to produce better products is a worthy "goal" to me!

Iron

Thanks, good session.

Iron

@Chistian: Is Vbus standardized at 3.3V? What if we send out 5V?

 

Iron

This is my goad, if I can help one of you to design a better product, I will be happy!

Stay tuned for the transfer modes and Classes tomorrow and Thursday.

 

We are brand new to USB embedding and are developing a peripheral that needs to exchange data with a computer.  USB 2.0 might be a good start as it appears to be less complex to implement and our data rates are relatively low. 

Thanks for presenting this course as it seems to be just what we need at this moment.

 

Iron

I have had good luck with the FTDI chips for devices.  The chip they offer for host side emulation, though, let me down.  I do not recommend that.

Iron

For 5Gbps, this was the best solution. (I believe the designers).

 

Seminar is a wealth of information. Many thanks. -- I just have to read the lecture before you give it to keep up...

Iron

For a battery powered device with a battery completed depleted 100mA for enumeration might not be enough. Why do we have such a limit?

This is by design. You can get more but only after enumeration.

I have had good success with the FTDI interface chips.  You can use either the virtual com port interface or take advantage of their DLL.

Iron

I will cover the drivers Thursday.

There are Classes that are more practical to use.

Thank you for the class. It is very much appreciated.

Iron

For our 8051 based design, please look at the FTDI chips.

We also need to look at what USB Class you would like to use. We will see that tomorrow and Thursday

 

For people wanting USB/Serial chip solutions ready to go -- lookup FTDI -- I use them.

Iron

No hardware yet; first iteration will probably be FPGA based.
Probably start with USB 1.1 to keep things as simple as possible.

Iron

@Christian: I was wondering why the standards committee chose to use a completely separate set of differential pairs for USB 3.0 transmit and receive, rather than doubling up at least one of those pairs on the existing D+ and D-? That would seem to increase the contact area within the connector for each conductor and just generally simplify things mechanically and electrically. What benefits were they trying to achieve?

Iron

thanks Christen. Lots and lots of infomation to dtgest.

For a battery powered device with a battery completed depleted 100mA for enumeration might not be enough. Why do we have such a limit?

Iron

Thanks Jennifer and Christian

Iron

Could you discuss standard vs custom drivers used with USB engines?

 

Gold

Hi Christian, i'm looking at adding USB to an 8051 design running at between 16-24Mhz to replace the serial port.  Is there a simple chip that can be used to add to the design that takes care of the protocol but interfaces into the 8051, i do understand that it would be a low speed solution.

 

Iron

Do both low/full speed use 0.8V signalling? Is 3.3V only seen during idle?

High Speed us 0.4V and Low/Full is 3.3 V Signaling.

Idle is 3.3V in Low/High and SE0 is used for HighSpeed idle

 

Also just learning USB at this time.  More training for increased career value to improve the odds of employment (I'm an unemployed Software / Systems (Requirements) Engineer))

Iron

The last 10 minutes my audio had been dropping out with long pauses. Always at the wrong times.

Iron

Design is ARM Cortex A8, 400-500MHZ.  Primarily looking to use HS for networking (~20Mbps) and data acquisition and control.

Iron

Thanks Christian. I am most interested in tomorrow's discussion especially enumeration.

 

Iron

Thanks Christian and Jennifer, a great session filled with the kind of detail I look for. See all tomorrow.

By the way, I'm a hardware guy.

Iron

Thanks Christian, Jennifer and Joe!

Iron

Getting ready to implement USB into car electronics.  Neede a jump start.

 

Gold

Thanks Jen and Christian

Iron

Thank you!

Version 3.0 has two data paths Tx and Rx along with the D+ and D-.  Is the D and D- used along with the other full duplex data path for data transfer?

Iron

Looking to use a CortexA8 with USB 2.0 for SSD application

 

Iron

Do both low/full speed use 0.8V signalling? Is 3.3V only seen during idle?

 

Iron

I'm using low speed with a 16 Mhz micro, but am interested in using higher speeds.

Iron

Great presentation, lots of good info

Thanks Christian and DIGI-Key

Iron

This will definately make me review what microcontroller will be used.

Iron

Thank you.  I look forward to tomorrow.

Iron

reload does not help

 

Iron

Thank you for the presentation

Iron

Thank you Christian and Jennifer.

Iron

My chip comes with 1.1 device and 2.0 host

Iron

Thanks Christian. I will listen to the archive to make sure I didn't miss anything.

Iron

USB 2 as fast as my PSOC can go.

Iron

The audio stopped at 25:27 mins

 

Iron

Thanks Christian, and Digi-Key!

Iron

I'm proud I could help.   :)

Fantastic presentation. Very information rich.

This was a really good overview.  Well worth a few extra minutes.

Iron

Wow lots of information

Iron

Cherry pie and ice cream time.   :)

A wealth of knowledge - thanks

 

Iron

Slide 34 (Power and Speed   configuration status)

Slide 30 (Self-Powered Devices)

Slide 28 (Device Powering)

Graphics on slides 23 & 24 do not showup on LibreOffice Impress.

Iron

Slide 27 (Device Powering)

Slide 26 (Device Powering)

how strict is 5 meter limit?

 

Iron

Slide 25 (Device Powering)

Gonji: Also read the presentation a day ahead and do some research before the class. I do -- it helps on these bigger presentatins.

Iron

Slide 24 (USB 3.0 Serial Engine)

Today's product doesn't require high speeds, but future development might.  Good to learn both - similarities and differences.

Iron

gongji, all of our classes are archived on our Digi-Key Continuing Education site, so you can go back and catch anything you may have missed.

Slide 23 (High Speed Hubs with Full and Low Speed Devices)

Amazing how different the USB 3.0 is from 2.0.

Iron

Theses USB presentation are very refreshing. I have done USB compliance tests for USB 2.0 in the past.

Iron

I am more interested in the protocol. I am hoping to get a definitive answer for when a packet is complete in all transfers; BULK, interrupt, etc

 

Iron

the presentation is too fast. I am lost.

 

Iron

Slide 22 (High Speed Resume)

Very interested what's happening with Wireless USB...

 

Iron

Slide 21 (High Speed Suspend)

Sensors connecting to a PC to upload data.

Iron

Device for debug, host for code updates (so far)

Iron

No hardware at this time but some embedded concepts are being considered.  Contol systems communications applications

Iron

Use USB for embeeded to PC transfer in my projects.

Iron

Embedded USB memory modules

 

Host will be HS capable.  Devices initially FS, could move to HS.  Plan on connecting up to 32 devices.

 

Iron

Medical device, green pwr

Slide 19  (USB 1.1 and USB 2.0 Packets)

just learning USB at this time

Iron

And you thought RS232 was confusing.

 

Iron

@Christian-  Design for connected multi-sensor device

Iron

Just reviewing USB for posible future need.

A compound device containing several sensors communicating to a processor in a small form factor package.

Iron

No hardware yet, but 1st iteration will no doubt be slowwww.

Iron

We're building Industrial Controls, high noise environment.

Iron

Does one device connecting at Lo Speed take the whole hub down to that speed?

getting to know embedded USB for future projects.

Iron

Slide 18 (High Speed Reset)

@JoeFromOzarks - you rock!

Iron

@bitbanger55 Strange. Doesn't do that when I follow the link.

Iron

Is there a third non-zero/non-one state?

Iron


@Lawson I went to the link below, and it offers to download an EXE before actually downloading.

http://www.2shared.com/document/SzC0cbfq/11-27-USB-Day-2.html

I'm looking at a slice of cherry pie, I keep wanting to type "slice" verses "slide."   :)

@Joe -- you get a significant pay raise with your new duties!

Iron

Finally got my audio to work right

Iron

LEARN MORE ABOUT THE APPLICATION OF EMBEDE DEVICES.

Kurb

Iron

If refreshing your browser doesn't help, remember the class will be archived on the Continuing Education Center site - in case you miss anything.

on slide 4, it looks like the D+/D- line is pulled down, not pulled up.

Iron

That's helpful, but with the wonky audio, we don't always hear it.

 

Iron

Audio stopping here also, does not restart have to click play.

Iron

Hi casner, I'm not sure what you mean. Christian is calling out the name of the slide as he changes. Is this helpful?

That assumes the slides are numbered like they were in that last one.

Iron

audio is not good. always stop

Iron

Jennifer, a previous course the person in your position posted which slide we were on when they changed. Can you do this?

Iron

Cheers from Massachusetts

Iron

Hello from southern california! Can't wait for the start of the session.

 

Iron

Hello from Washington, D.C.

 

Iron

Please join our Digi-Key Continuing Education Center LinkedIn Group at http://linkd.in/yoNGeY

Hello from Wisconsin!

 

Iron

hello everyone from Timisoara, Romania

Iron

The streaming audio player will appear on this page when the show starts promptly at 2 pm EST. Note, however, that some companies block live audio streams. If when the show starts you don't hear any audio, try refreshing your browser.

Wisconsing Representing.
Hello everyone

Iron

Hi from Costa Mesa, CA

Iron

If you haven't already, please be sure to download today's slide deck. You will find it under Special Educational Materials.

 

Hi Everyone from Atlanta, GA

 

Iron

Hi from Midland Tx

 

Iron

@bitbanger55 Huh? You must be doing it wrong. Or you are joking.

Iron

Hi everyone. Welcome. Our show is set to begin in 8 minutes.

Hi from Spokane

Filtered sunshine and 34F

Iron

Hello from Albuquerque.

Iron

@Lawson The PDF download seems to involve getting and running an EXE file. What's up with that?

Cedar Park Texas here for session 2

Iron

hello all from chilly Edmonton, Alberta

Iron

Florida checking in...

Iron

Good afternoon, everyone

Iron

@Kentj I was wondering about that myself.  The CEC Overview page says they have 45 minutes, but it seems like they are always shooting for 30.  Maybe they're including the Q&A session afterward...

Iron

Hi for chilly Huntsville, Al.

Iron

Howdy from Fort Worth, TX

Iron

some things say he's got 45 minutes to talk. Others 30 minutes.  45 wouldn't bother me a bit.

Iron

Hello from sunny SE Lake Simcoe, Ontario Canada. Just snow flurries occasionally today though.

35 slides -- CHristian will have to talk fast -- and even faster tomorrow.. ;-)

Iron

Its a rainy 70 degree day in Hilo HI.

Iron

Hello all from a cool 57 Richmond, TX

Iron

Hello from Chatsworth, CA where it just might rain.

Iron

Hello from Scottsdale, AZ

Sunny 59°F now with a High of 80°F

Iron

hello from Toronto area..

Iron

Good afternoon from MA. Looking forward to this week's sessions.

Iron

Hello from snowy New York.

Iron

@Lawson Perfect - Thanks!    I always convert to PDF so I can make notes in the PDF during the class.

Iron

Good Morning from San Jose, CA.

It's 49°F now an d a High of 63°F.

Iron

@EdB_Vt  I saved the presentation as a pdf.  You can download the file here:

http://www.2shared.com/document/SzC0cbfq/11-27-USB-Day-2.html

 

Iron

Good morning from Milwaukee.

Iron

Good morning from Scottsdale

Iron

I have the following problem with Today's Slide Deck:

Using PowerPoint Viewer 2003: incorrect text size in tables on pages 9, 10, 11, 12, 13, 14, 18, & 26

Using PowerPoint Viewer 2007: on slide 23, "... encountered a problem and had to close" (crashes)

Iron

Good morning from cold Nebraska!

Iron


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