Breaking News
Blog

Embedded vs. discrete processors: debate at ESC

Richard Nass
3/4/2010 02:00 PM EST

 1 comments   post a comment
NO RATINGS
View Comments: Threaded | Newest First | Oldest First
jbird481
User Rank
Rookie
re: Embedded vs. discrete processors: debate at ESC
jbird481   4/16/2010 5:33:43 PM
NO RATINGS
The problem with CPU-inside-FPGA approach, at least with my experience using MicroBlaze in Spartan 3A, is that there is not enough block RAM in the FPGA to hold a typical embedded app. The RAM must hold both code and data, and 45 Kbytes in the 700A part is just not that much. So you have to use an external DRAM. And the DRAM controller IP core is complex, for example the datasheet for the Xilinx mpmc core is over 200 pages in length. So you will have a lot of learning to do! Another problem with CPU-inside-FPGA approach ...when you include cost of external DRAM, and needing to use a larger FPGA to hold CPU .... it is no cheaper than separate CPU and FPGA approach. CPUs like Cortex M3 are very low cost. Jim

Top Comments of the Week
August Cartoon Caption Winner!
August Cartoon Caption Winner!
"All the King's horses and all the KIng's men gave up on Humpty, so they handed the problem off to Engineering."
5 comments
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Times on Twitter
EE Times Twitter Feed
Radio
LATEST ARCHIVED BROADCAST
David Patterson, known for his pioneering research that led to RAID, clusters and more, is part of a team at UC Berkeley that recently made its RISC-V processor architecture an open source hardware offering. We talk with Patterson and one of his colleagues behind the effort about the opportunities they see, what new kinds of designs they hope to enable and what it means for today’s commercial processor giants such as Intel, ARM and Imagination Technologies.
Flash Poll