MT6595解決方案及參考設計將會在上半年開始向全球客戶發送，終端產品會在今年下半年問世。

但ARM的官方時程表卻顯得詭異。

If a customer is looking to ship in 2014, Cortex A12 will be the only option for them in the mid-range from ARM. If a customer wants big.LITTLE or they are starting a design now, Cortex A17 is the obvious fit. We should see the first devices using Cortex A17 CPU cores shipping in early 2015. Cortex A17 IP will be available to ARM customers for implementation by the end of this quarter.
- ARM

季底IP方就緒，MT6595現在端出，是咋回事？




Cortex A17 is a design that is roughly 60% faster than a Cortex A9r4 at a given frequency/process/memory interface (Cortex A12 is 40% faster than A9r4 under the same conditions).

On a given process node, the Cortex A17 can occupy around 20% more area than a Cortex A9 or a marginal increase over a Cortex A12 design. Running the same workload, the Cortex A17 is expected to be 20% more energy efficient than the Cortex A9 (race to sleep), but with higher peak power consumption from the A17.

ARM expects to be able to deliver similar performance to the Cortex A15 (in mobile apps/benchmarks, likely not in absolute performance), but in a much smaller area and at a lower power. If this is just what the Cortex A15 should have been from the very beginning, at least for mobile applications.

相當諷刺的評論，Cortex-A15本來就應該達到這個目標的。



Cortex A17 takes the basic 2-wide out-of-order architecture of the Cortex A12 and improves it. The front end and execution engine are similar to Cortex A12, with most of the performance/efficiency gains coming from improvements to the memory subsystem.



原來當初的A12是半殘 (AMBA 4 AXI, lacking the requisite coherent interface)，無法支援big.LITTLE，A17現在修正（AMBA 4 ACE）過來了。




用免驚，64位元不會把32位元幹掉的。