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what have bandwidth both wordwide=1 and wordwide=0?
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what have bandwidth both wordwide=1 and wordwide=0?

dv2 posted on 23 Dec 2012 7:39 AM PST
Top Contributor
113 Forum Posts

 hi 

In Fx2lp, if i use SLAVEFIFO mode,  

What is different (bandwidth / speed )point in wordwide=1 and  wordwide=0?

i know wordwide=1  is [15:0]  16bit mode. but i dont know.

if i use wordwide =1 in slavefifo mode, is bps (bits per second) is almost same in wordwide=0?

Then, wordwide=1 have actually total high bandwidth and fast bps than wordwide=0. ins't it ?




Re: what have bandwidth both wordwide=1 and wordwide=0?

akop posted on 23 Dec 2012 09:20 AM PST
Member
10 Forum Posts

For maximum bandwidth use will be 16-bit bus. In the slave mode and 16-bit bus  I transfer data at 30 megabytes per second (Windows XP SP3, c++, data took fpga).



Re: what have bandwidth both wordwide=1 and wordwide=0?

dv2 posted on 23 Dec 2012 07:50 PM PST
Top Contributor
113 Forum Posts

 Thanks a lot

What if 8bit mode have 30MBytes per second, does have 60MBytes per second in 16bit mode ?



Re: what have bandwidth both wordwide=1 and wordwide=0?

akop posted on 24 Dec 2012 11:26 PM PST
Member
10 Forum Posts

not so fast. I get  30 mbyte in 16 bit mode...



Re: what have bandwidth both wordwide=1 and wordwide=0?

dv2 posted on 24 Dec 2012 11:51 PM PST
Top Contributor
113 Forum Posts

 ok so what if 8bit mode?



Re: what have bandwidth both wordwide=1 and wordwide=0?

dv2 posted on 24 Dec 2012 12:12 AM PST
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113 Forum Posts

 Did think 16bit mode helpful for  speed up ?

 



Re: what have bandwidth both wordwide=1 and wordwide=0?

akop posted on 24 Dec 2012 01:51 AM PST
Member
10 Forum Posts

 rate strongly depends on the hardware unit receives data from chip. but without the use of 16 mode, you will not be able to get high speed






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