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A5: All Apple, part mystery

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ManasK.RayChaudhuri
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re: A5: All Apple, part mystery
ManasK.RayChaudhuri   4/22/2011 1:47:29 AM
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Let us wait and watch the reactions of other companies.

ManasK.RayChaudhuri
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re: A5: All Apple, part mystery
ManasK.RayChaudhuri   4/22/2011 1:45:16 AM
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It is definitely not crap.Await the results.

ManasK.RayChaudhuri
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re: A5: All Apple, part mystery
ManasK.RayChaudhuri   4/22/2011 1:43:46 AM
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I would eagerly await a detailed writeup on the subject in order to evaluate properly.

ManasK.RayChaudhuri
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re: A5: All Apple, part mystery
ManasK.RayChaudhuri   4/22/2011 1:40:36 AM
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Agreed,but one has to consider the price factor.

SZA
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re: A5: All Apple, part mystery
SZA   4/19/2011 7:13:22 PM
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Agreed. With both A4 and A5 on same node and A5 much larger than A4 while iPad still maintaining similar battery life. It certainly seems Apple has exploited clever hardware+software exploitation. It is still relatively hard for rivals to do that in current form (perhaps future close partnerships arise for Android+Samsung, Microsoft+Nokia :)).

jpnKevin
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re: A5: All Apple, part mystery
jpnKevin   4/18/2011 7:59:55 PM
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Apple becoming involved in semi-design to higher degree will certainly give them flexibility and may result in an ongoing strategic advantage. A lot more understanding could have added in the article by comparing it to other ARM Cortex A9 processors on 45nm silicon like OMAP4; http://focus.ti.com/lit/ml/swpt034b/swpt034b.pdf Just looking at the block diagram and comparing it to A5 would tell you alot. You could have discussed differences in size between PowerVR SGX543MP2 in A5 and PowerVR SGX540 in OMAP4; http://www.anandtech.com/show/4216/apple-ipad-2-gpu-performance-explored-powervr-sgx543mp2-benchmarked http://en.wikipedia.org/wiki/PowerVR Even ARM's site itself provides info on example die sizes with different process for development kit chips that give some insight on what to expect. Cortex A8 supported optional upto 1MB of L2 Cache while A9 supports upto 8MB for example. Here is an interesting quote; "A final mobile constraint that must be addressed is balancing the need to minimize die size, but providing large enough memory cache to keep multiple cores from being stalled. If a single core device requires N amount of cache, up to 4*N cache may be required to achieve good performance in a multicore device. Other memory design issues include data coherence and system memory consistency, to ensure processors all have access to the current data at the correct time" See Page 3; http://focus.ti.com/pdfs/wtbu/smp_wp_swpy022.pdf Some more general information from other chip makers of ARM designs would have provided more insight. Sure there are lots of different IP blocks to choose from and it is important to have designer level understanding to make right choices. But Apple has nothing to gain making IP choices or custom development public public it is not selling chips. Apple can also benefit from the "magic" of people imagining they are doing much more than they actually are.

Stephen.Sliva
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re: A5: All Apple, part mystery
Stephen.Sliva   4/17/2011 1:04:01 AM
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My guess is that facetime is going to get REALLY fancy. You're looking at multi-way videoconferencing. One-on-one is soooo 2010. All that extra logic is just more GPU-like crap.

Indoamerican_Sikh
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re: A5: All Apple, part mystery
Indoamerican_Sikh   4/15/2011 10:27:42 PM
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It would be good to compare A5 to the other Top 3 SOCs; Has EE times ever done a disection of the Atom Processor ? Why would Apple tout the A5 ? An Ideas for future article: Can the A5 architecture be implemented in a 28 nm FPGA [Altera, Xilinx, Archonix] with similar performance and cost ?

danny1024
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re: A5: All Apple, part mystery
danny1024   4/15/2011 6:01:18 PM
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What a way to squander the PA-SEMI acquisition (their lead design team has almost entirely jumped ship)and the their PA6T architecture. Rather than unify their entire product range under a single, modern ISA (PowerPC) Apple elected to fragment it with ARM, PowerPC and x86. And to add insult to injury, ARM's Neon SIMD ISA is just woeful compared to VMX or even SSE.

Paul Boldt
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re: A5: All Apple, part mystery
Paul Boldt   4/15/2011 3:53:28 PM
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When the A4 came out there was speculation that it would not support cameras because they were not included in iPad. Then iPhone 4 had two cameras and an A4. While not touching on this thread in the article I suspect the same. There is likely an "upgrade cycle" lurking in there somewhere. Paul

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