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Altera_Forum
Honored Contributor I
884 Views

All avalon singnal sync to avalon bus clock

sorry for my noob question. im a bit new to avalon bus architechture. 

 

 

--- Quote Start ---  

Synchronous Interface — All Avalon signals are synchronized to the Avalon 

bus clock. This simplifies the relevant timing behavior of the Avalon Bus, 

and facilitates integration with high-speed peripherals. 

--- Quote End ---  

i read this in avalon bus spec : https://www.alteraforum.com/forum/attachment.php?attachmentid=2421  

 

1.by avalon bus clock does it mean the clock we fed to the processor? If so... how about an SOPC system without any processor? 

 

for example in a system like below this. what is exactly the freq of avalon bus? How can i determine it?  

https://www.alteraforum.com/forum/attachment.php?attachmentid=2422  

 

2. what does this sentence actually meant "this simplifies the relevant timing behavior of the avalon bus, 

and facilitates integration with high-speed peripherals

 

Does it mean that i dont have to worry about syncronization between slower peripheral and highspeed connected to the avalon bus?
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2 Replies
Altera_Forum
Honored Contributor I
28 Views

Any Avalon device uses the clock specified in the clock columns of sopc builder. 

If you have modules using different clocks, you need a clock crossing bridge to match them. 

You can find further (and more trustable...) information in the following document: 

http://www.altera.com/literature/tt/tt_nios2_system_architect.pdf 

(see for example page 3.9)
Altera_Forum
Honored Contributor I
28 Views

 

--- Quote Start ---  

Any Avalon device uses the clock specified in the clock columns of sopc builder. 

If you have modules using different clocks, you need a clock crossing bridge to match them. 

You can find further (and more trustable...) information in the following document: 

http://www.altera.com/literature/tt/tt_nios2_system_architect.pdf(see for example page 3.9) 

--- Quote End ---  

 

 

 

thanks for the documentation and quick reply..:)
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