Basic doubt in I2C interface
Bookmark this page:
 Yahoo!
 Google
 Windows Live
 del.icio.us
 digg
 Netscape
|
|
|||||||||||||||||||||||||||||||||||||
|
Posted by prav on April 4, 2005, 12:45 am
Please log in for more thread options Hi all, I have got a basic doubt in I2C interface. In my s/m there are 4 masters(4 video processors). Now my question if all the 4 processors have the same device address,so they cannot sit on the same I2C bus. I need 4 differnt I2C buses. But then i am not using the I2C effectively. Any suggestions. Thanks in advance , Praveen | |||||||||||||||||||||||||||||||||||||
|
Posted by Apparatus on April 4, 2005, 6:49 am
Please log in for more thread options Hi Praveen, On most chips of any complexity the IIC address should be configurable. Check this first. If not, you could use a CPLD (writing your own VHDL) to modify the address of the chips. This is really more of a hack than a clean solution, but it should work. Not only will you not be using the bus effectively if you have duplicated addresses, but you will have a fight on the bus (when the 4 processors simultaneously respond to a request). Chris | |||||||||||||||||||||||||||||||||||||
|
Posted by John Fields on April 4, 2005, 8:41 am
Please log in for more thread options
On 3 Apr 2005 21:45:18 -0700, praveenkn123@yahoo.com (prav) wrote: --- Go to sci.electronics.basics. -- John Fields Professional Circuit Designer | |||||||||||||||||||||||||||||||||||||
|
Posted by Luhan Monat on April 4, 2005, 1:16 pm
Please log in for more thread options
prav wrote: > Hi all,
> > I have got a basic doubt in I2C interface. See a priest? > In my s/m there are 4 masters(4 video processors).
S/M - thats another newsgroup... > Now my question if all the 4 processors have the same device
> address,so they cannot sit on the same I2C bus. I need 4 differnt I2C > buses. Don't sit on the bus, take the A-train uptown. > But then i am not using the I2C effectively.
> Any suggestions. > > Thanks in advance , > Praveen You're welcome. -- Luhan Monat (luhanis 'at' yahoo 'dot' com) "The future is not what it used to be..." http://members.cox.net/berniekm | |||||||||||||||||||||||||||||||||||||
|
Posted by Paul Rolfe on April 4, 2005, 7:22 am
Please log in for more thread options
> prav wrote:
> > Hi all,
> > > > I have got a basic doubt in I2C interface. >
> See a priest? > > > In my s/m there are 4 masters(4 video processors).
>
> S/M - thats another newsgroup... > > > Now my question if all the 4 processors have the same device
> > address,so they cannot sit on the same I2C bus. I need 4 differnt I2C > > buses. >
> Don't sit on the bus, take the A-train uptown. > > > But then i am not using the I2C effectively.
> > Any suggestions. > > > > Thanks in advance , > > Praveen >
> You're welcome. I dont understand what you are trying to achieve, by having the four devices on the one address. As far as hardware is concerned, true I2C is open collector, so you wont do dammage. Normally I2C is fast enough, and I would doubt (unless you are actually streaming video) that the bandwidth limitations should be an issue. I would put the devices on different addresses. Paul | |||||||||||||||||||||||||||||||||||||
| Similar Threads | Posted |
| Basic doubt in I2C interface | April 4, 2005, 12:45 am |
| Basic doubt | December 22, 2005, 10:27 pm |
| doubt | June 30, 2007, 1:15 am |
| doubt | February 9, 2008, 6:34 am |
| PCI arbiter doubt | January 17, 2006, 12:17 am |
| Doubt about SERDES | March 31, 2006, 12:05 pm |
| PIC Language Doubt | September 2, 2006, 11:10 am |
| Please clarify my doubt | August 18, 2007, 4:55 am |
| Protel design doubt | February 28, 2005, 7:10 pm |
| PCI arbiter doubt in REQ signal | January 18, 2006, 10:36 pm |
| US weathermen start to doubt AGW | December 7, 2008, 9:21 pm |
| Re: FM24C256 serial EEPROM, doubt in page write mode | August 9, 2008, 9:37 am |
| You are able to understand the following evidence, you will not doubt my identity!I am Isaac Newton!Radio Free Asia!"Ezra" | December 30, 2008, 9:13 am |
| Basic question for somebody to help me with | December 16, 2004, 4:33 pm |
| basic ECL question | July 12, 2005, 3:58 pm |
>
>I have got a basic doubt in I2C interface.
>In my s/m there are 4 masters(4 video processors).
>Now my question if all the 4 processors have the same device
>address,so they cannot sit on the same I2C bus. I need 4 differnt I2C
>buses.
>But then i am not using the I2C effectively.
>Any suggestions.