| Title | ARM Cortex-A35, Snapdragon 820, and New Imagination MIPS Processors | |
| Date | Tuesday November 24 2015, @07:58PM | |
| Author | martyb | |
| Topic | ||
| from the better-late-than-never dept. | ||
ARM Announces New Cortex-A35 CPU - Ultra-High Efficiency For Wearables & More
... as part of the volley of announcements at ARM's TechCon conference we discover ARM's new low-power application-tier CPU architecture, the Cortex-A35. [...] As such, the A35 is targeted at power targets below ~125mW where the Cortex A7 and A5 are still very commonly used. To give us an idea of what to expect from actual silicon, ARM shared with us a figure of 90mW at 1GHz on a 28nm manufacturing process. Of course the A35 will see a wide range of implementations on different process nodes such as for example 14/16nm or at much higher clock rates above 2GHz, similar to how we've come to see a wide range of process and frequency targets for the A53 today.
Most importantly, the A35 now completes ARM's ARMv8 processor portfolio with designs covering the full range of power and efficiency targets. The A35 can also be used in conjunction with A72/A57/A53 cores in big.LITTLE systems, enabling for some very exotic configurations (A true tri-cluster comes to mind) depending if vendors see justification in implementing such SoCs.
ARM Announces ARMv8-M Instruction Set For Microcontrollers – TrustZone Comes to Cortex-M
Previously only available to ARM-A architecture CPUs, TrustZone is now being extended to ARM based microcontrollers. And like their bigger siblings, ARM's aim here with TrustZone is to lay the groundwork for their customers to build highly secure devices, for all the benefits and drawbacks such a device entails. This includes protecting cryptography engines and certain stored assets (e.g. the secure enclave) against attack, locking down systems to prevent userland applications from breaking into the operating system itself, and various degrees of DRM (one example, as ARM gives is, is firmware IP protection).
Qualcomm Snapdragon 820 Experience: HMP Kryo and Demos
In power, Qualcomm published a slide showing average power consumption using their own internal model for determining days of use. In their testing, it shows that Snapdragon 820 uses 30% less power for the same time of use. Of course, this needs to be taken with appropriate skepticism, but given the use of 14LPP it probably shouldn't be a surprise that Snapdragon 820 improves significantly over past devices. The other disclosures of note were primarily centered on the CPU and modem. On the modem side, Qualcomm is claiming 15% improvement in power efficiency which should eliminate any remaining gap between LTE and WiFi battery life.
Imagination Announces New P6600, M6200, M6250 Warrior CPUs
Starting off with the P6600, this is Imagination's new MIPS flagship core succeeding the P5600. The P5600 was a 3-wide out-of-order design with a pipeline depth of up to 16 stages. The P6600 keeps most of the predecessor's characteristics such as the main architectural features or full hardware virtualization and security through OmniShield, but adds compatibility for MIPS64 64-bit processing on top. Imagination first introduced a mobile oritented 64-bit MIPS CPU back with the I6400 a little more than a year ago but we've yet to see vendors announce products with it.
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