Given the timing of yesterday's Cortex A53 based Snapdragon 410 announcement, our latest Ask the Experts installment couldn't be better. Peter Greenhalgh, lead architect of the Cortex A53, has agreed to spend some time with us and answer any burning questions you might have on your mind about ARM, directly.

Peter has worked in ARM's processor division for 13 years and worked on the Cortex R4, Cortex A8 and Cortex A5 (as well as the ARM1176JZF-S and ARM1136JF-S). He was lead architect of the Cortex A7 and ARM's big.LITTLE technology as well. 

Later this month I'll be doing a live discussion with Peter via Google Hangouts, but you guys get first crack at him. If you have any questions about Cortex A7, Cortex A53, big.LITTLE or pretty much anything else ARM related fire away in the comments below. Peter will be answering your questions personally in the next week.

Please help make Peter feel at home here on AnandTech by impressing him with your questions. Do a good job here and I might be able to even convince him to give away some ARM powered goodies...

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  • Fergy - Tuesday, December 10, 2013 - link

    Really try to inform yourself a little bit better before asking all these questions. Krait 600 and 800 that are in most phones and tablets are 100% new designs from Qualcomm. Krait 410 is not a new design and is licenced from ARM.
  • phoenix_rizzen - Wednesday, December 11, 2013 - link

    There's no such thing as "Krait 600" or "Krait 800". You're mixing up CPU and SoC names.

    The newest Krait CPU from Qualcomm is the Krait 450 CPU, part of the upcoming Snapdragon 805 SoC.

    The current Krait CPUs available in phones are the Krait 200 (Snapdragon S4 Pro), Krait 300 (Snapdragon S600), and Krait 400 (Snapdragon S800).

    Yes, their naming scheme is horrible.
  • nafhan - Wednesday, December 11, 2013 - link

    I mistakenly thought we had someone from Qualcomm answering the questions. I didn't say anything about the "Krait" (or Snapdragon) 410 having a Qualcomm designed CPU.
  • hlovatt - Tuesday, December 10, 2013 - link

    With Apple and yourselves taking different approaches to ARM64 do you have any thoughts on what the different trade offs you both made were and what the knock on effects are in terms of were the two implementations might shine?

    Thanks for taking questions on AnandTech.
  • Try-Catch-Me - Tuesday, December 10, 2013 - link

    What do you have to do to get into chip design? Is it really difficult to get into companies like ARM?
  • Peter Greenhalgh - Wednesday, December 11, 2013 - link

    An Engineering degree in electronics and/or software for a start. Passion for micro-architecture & architecture certainly helps! :)
  • mercury555 - Tuesday, December 10, 2013 - link


    What emotion comes to mind on the fact that ARM wishes to forget the big.LITTLE with a 64 bit equivalent of A12 limited to a Quad-Core configuration for consumer electronics?

  • Fergy - Tuesday, December 10, 2013 - link

    Where did you read that ARM is stopping with big.LITTLE?
  • Peter Greenhalgh - Wednesday, December 11, 2013 - link

    Hi Mercury,

    ARM continues to believe in big.LITTLE which is why we improved on interoperability in the Cortex-A53 and Cortex-A57 generation of processors. In future processor announcements I’m sure you’ll see our continued focus on big.LITTLE as a key technology that enables best possible energy efficiency.
  • mercury555 - Thursday, December 12, 2013 - link

    Thank you for taking out time to answer.

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