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Does anyone has such experience?
Hi Merkury, It's a bit difficult to answer.
There are different extensions available on the ARM9 and ARM926. Depending on the implementation that the silicon vendor made, the gate count will vary. Other factors could be the technology, cache...
The ARM marketing site gives some of the ARM926EJ-S™ processor details.
Hi Alban
Thank you for your reply!
Could you give the gate count of STD of ARM926? No cache, no memory. I only want to know the gate counts, so I think it has no relationship with the technology.
You can use the small configuration for ARM926. Or you use an alike configuration that others used.
Is 200KG+ reasonable?
Thank you.
Merkury
Hi,
Further to Alban's reply, it really is difficult to give a definitive answer to this question. Since we deliver the ARM926EJ-S to licensees as synthesizable VHDL, the gate count of the final device depends on the design rules and cell libraries used as well as the configuration options.
Chris
Hi Chris,
Thank you for you reply!
I saw this table in your website, so do you have the area information under TSMC 40nm?
Or do you have the gate count under TSMC 90nm G? We can use "0.5/area of 2-input NAND in ARM SC7" to compute the rough number of gate count.
Do you think so?
TSMC 180nm G
TSMC 130nm G
TSMC 90nm G
Speed Optimized
Area Optimized
ARM SC9
ARM SC12
ARM SC7
220
304
262
517
275
1.1
200
276
238
470
250
8K/8K
6.5
2.78
2.39
1.40
0.85
3.0
1.61
1.45
1.01
0.50
-
0.48
0.235
0.14
0.36
0.20
0.11
Power Efficiency† - with cache (DMIPS/mW)
2.29
4.68
7.85
3.05
5.5
10.0
Yes, I suppose you could reverse-engineer the area figures! But we don't keep that table up to date and I don't believe we have newer information from the ARM926. Remember that it is quite an old processor these days!
Can I ask why you are so keen to know the gate count? Most people would be concerned with the area more than anything else.
Because we want to use a CPU to do our control and a little compution work. We are evaluating the ARM926 and some other CPUs. They have the similiar performance but we don't know the area of ARM926 under 40nm process. So I log in and want to find some help here.
Hi again,
I have just had a word with the Product Manager for the ARM9 range. He confirms that we don't have data for this process. He is, however, happy for you to contact him direct and he is happy to try to help out with your evaluation. Can you email me directly (Chris.shore@arm.com) and I will send you his details.
Hope this helps.