tusb2046b hub

Prateek,

A couple of follow-up questions:
1. Can we review your schematic?
2. What operating system is running on the laptop?
3. Is the host connected directly to the laptop or via a wireless USB dongle?
4. Is anything connected on the downstream port(s)?
5. Are you in bus-power or self-powered configuration?

hi

1.schematic is same which is given in the datasheet.

http://www.datasheetcatalog.org/datasheet/texasinstruments/tusb2046b.pdf

self-powered hub, ganged port power management,its figure no-12 page no-14.

2..we tried on both windows 7 and xp but the proble was same it show "unrecognized device".

3 yes we connected the host directly to  the laptop.

4.we connected an apple ipod with it.

5.self-powered configuration

The schematic in the data sheet is not a complete reference schematic as indicated in the footnotes - it is only intended as high-level guidelines.

Please see the full reference schematics in the product folder for additional required circuitry.

hi 

thanx for replying me the full reference schematics.tomorrow i will work on this we have to make it wirelessly to .have you any idea how to do that.?

what we are thinking we are trying to attach this with a bluetooth module.

Prateek Sharma

Prateek,

Have you looked at some of the off the shelf Certified Wireless USB host adapters (for the PC side) and Device Adapters (for the hub side)?

You can find onfo on the on the USB-IF Organization Site.

Hi,

thanks for replying. wireless is my next step fist i have to make this schematics

Do we need any driver to install for this schematics.  

Prateek Sharma

Hello Prateek,

The TIUSB2046 does not need any driver to work on a windows platform (XP and newer), microsoft  has native support for this component.

Regards.

thanks 

Hi 

can you please tell me is it compulsory to put 22pf capacitors which are grounded..

Prateek Sharma

Hello Prateek,

If you refer to the  22pF capacitors connected to Gnd and to the DP/DM signals:  yes, they are required to meet the electrical requirements of the USB specification.

Regards.

hey thanks for replying can u tell me whats the role of EEPROM over here if the tusb2046b is self programmed.

Prateek Sharma

Hi Prateek,

The EEPROM is optional for customers who wants to have their own PID (product ID).

If you do not want to place an eeprom, when you connect the TUSB2046 to a PC, you will see a "Generic USB Hub" on the device manager, but there is no functional difference with or without eeprom.

Regards.

1 more thing i tried so many search regarding about the socket of tusb2046b but i am not able to found it so i made a pcb for it and solder is there any other way or where i found a socket for this.and is this circuit is complete.

Hello Prateek,

Sorry, but we don't have a socket pcb for the TUSB2046.

If you want, you can attach your schematics for review.

Regards.

hi

this is the schematic that i am using tell me if there is any change or also the parts which are optional. 

thanks

Prateek Sharma

3326.2046-PlainSelfPower.pdf

Hmm..  I see you are using the schematics form ti.com

That design should work.

But, probably you don't need that level of integration.

Attached is a schematic for the TUSB2036 which is similar to the TUSB2046 but not equal.

Be aware and be careful of the differences in the terminals BUSPWR, DP0PUR and GANGED, also there are terminals in the TUSB2036 that are not present in the TUSB2046.

Again, the EEPROM is optional.

Regards.4657.6Mhz Self-powered 3-port hub.pdf

hey 

Actually the problem is that i already purchase tusb2046b now its a spring break if i am going to oder the new one it will come after the spring break but i have to submit my project after the spring break.

Prateek Sharma

hi 

i connected my circuit to my laptop.but i found the same result "usb device not reconginzed"  please help me out with this ASAP.

Prateek Sharma

hey 

1.You told me EEPROM is optional so i didn't attached that part.and my pin no 5 and 6 are open in TUSB2046b you want me to connect this to 3.3 volt.

2.how to check the suspend output is high or not .i just connected my pin 32 to led suspended.

thanks

Prateek sharma

the schematics is the same the things that i am not connected is EEPROM means there is no connection on pin 5 and 6.

2).i make the circuit only for 2 ports i.e usb port 1 and usb port 2 (right hand side in the schematics)..which means pin no 19 20 23 24 are not attached to any one.

3) PIN no 32 Suspended i connected it to the LED suspend.the led which is near by the jumper..

4)when i checked the voltage in my circuit i dont have 5 volt.on the right side of both usb ports.

6165.2046-PlainSelfPower.pdf

Reply ASAp i have to submit this on monday

ok thanks i will try this steps and let you know in 1 hr .

i follow your steps its show first a generic usb hub but when i unplugged and plugged again it does not show any thing.

intersting thing is that when i tried to another laptop again it show the same thing then when i plugged it again it doesnot show any thing

prateek Sharma

hey congrats i got it found the solution thanx alot 

the steps you told me work for me .

thanks alot

Prateek SHarma

i want to add card reader to the system, please give suggestions 

Hello Prateek,

We will be happy to  provide support regarding TI devices, but you need to be more specific on your requirement.

Regards.

hi 

now i need your help to add card reader in this schematic ..

Prateek,

Texas Instruments does not have any USB controllers that can be used as card readers. 

The downstream connections are the same no matter what type of USB peripheral is connected. 

Specifics on the acrd reader will need to be provided by the supplier of your card reader.

Elias,

Do you know what the default PID and VID is when an EEPROM is not connected?

Thanks.

-Rich

Hello,

VID = 0451

PID = 2046

Regards.

Thanks Elias!

Hello Dan,

What is the diference with tusb2077 for self powered?

Only make a clone for  aditional circuit in extra downstreams?

Thank You

Alfredo,

I am sorry but I am not sure what your question is.

When you ask "What is the diference with tusb2077 for self powered?",  you are asking me to compare this to something else - I am not sure what you are wanting me to compare it to?  The TUSB2077A as a bus-powered hub or one of our other hubs?

Alfredo,

I am sorry but I am not sure what your question is.

When you ask "What is the difference with tusb2077 for self powered?",  you are asking me to compare this to something else - I am not sure what you are wanting me to compare it to?  The TUSB2077A as a bus-powered hub or one of our other hubs?

Oh, Sorry, My mistake, i forget select  "Quote" link in my previous post.

Ok, I see the schematic inside zip file in http://www.ti.com/litv/zip/sllr048.zip [full reference schematics], 2046-PlainSelfPower.pdf.

I need design 7 port hub USB with TUSB2077A, here my question:

What is the difference of the 2046-PlainSelfPower.pdf circuit with a TUSB2077A for self powered? Only clone circuit for extra downstreams? (and the pinout obvios difference of course).

Thank You.

Alfredo,

Ok, now I understand.

Fundamentally, yes, that is all that changes.  You will need additional power available as you are required to provide the full 500mA on each of the downstream ports.

I have attached the TUSB2077AEVM schematic for reference as well.

Dear ELIAS.

if I let  the downstream port which is unused float, What effcet it will result in?

BR,

jinrong

Hello Jinrong,

Leaving unconnected a downstream port of the TUSB2046B could cause a false detect of a device presence, the unused ports should be terminated to ground through a 15K resistor.

Regards.

Just what I need

Hi Elias,

If we are going to use this in commercial use then Is it must to purchase VID/PID or we can use the default provided by TI without any limitation ?

Regards,

Hello,

You can use the default VID/PID, all depends on what you want to be displayed on your device's descriptors, using the default VID/PID you will see a VID=0451 and a Product ID equal to 2046.

Regards.

Hi Elias,

If that is fine then for commercial product there is no need to purchase any VID/PID right? And also need not to ask for permission to TI ?

Correct,

You can use the default VID/PID just as is.

Regards.

Thank you Elias,

Somewhere I also come to know about one document where user can request TI to use their PIDs.