When Apple (NASDAQ:AAPL) released the iPhone 5 powered by its home-grown A6 system-on-chip, AnandTech was one of the first -- if not the first -- to point out that Apple had, in fact, designed its own CPU core rather than license one from ARM Holdings (NASDAQ:ARMH). This signaled, perhaps quite loudly, that Apple was extremely serious about building up its in-house chip design capabilities.

Here we are today, with Apple having just launched its latest iPhones and iPads featuring the A8 and A8X chips, respectively. AnandTech refers to the CPU core inside of the A8/A8X as an "Enhanced Cyclone" (Cyclone was the name of the CPU core inside of the A7), meaning that Apple has now launched three CPU cores over the course of three years.

While the world was shocked at the performance of Apple's A7 and the Cyclone core within when it first made its debut in the iPhone 5s, I'm confident that Apple's A9 is going to be an even bigger step forward than the A7 was.

Apple's A9 benefits from a substantially higher R&D budget
Apple has hired engineers from many of the top chip development houses in the world including Intel (NASDAQ:INTC), ARM Holdings (NASDAQ:ARMH), and IBM (NYSE:IBM). Although Apple got an excellent team when it acquired PA Semi in 2008, Apple's continued financial success over the years has allowed it to invest very heavily in attracting and retaining even more of the industry's best and brightest.

However, while Apple's chip team is great, the results that we're seeing in chips such as the A6, A7, and A8 are efforts that began years back. For example, this graphic from ARM Holdings helps give investors a flavor of how long it takes to put together a chip from start to finish:

Cycle Time

Source: ARM Holdings.

For the processor core alone, ARM claims a 2-year development cycle (and I'm sure it gets longer as the processors become more complex). The "partner chip design" looks like another 2 years, but the final system-on-chip design can be worked on before the processor core is completely finished, so the total chip development time looks as though it's about 3 years.

To put this into perspective, using the ARM information as a rough guide, here's a table showing my estimates of when Apple could have started and finished the development of its most recent three system-on-chip designs:

System-on-chip

Start

Production

iPhone launch

A6

Mid 2009

Mid 2012

September 2012

A7

Mid 2010

Mid 2013

September 2013

A8

Mid 2011

Mid 2014

September 2014

Source: Author estimates.

The above would suggest that Apple began work on what will likely be the A9/A9X chips at some point in mid-2012. In order to understand what this might mean, let's take a look at another very relevant Apple-related chart:

Apple

Source: YCharts.

When the A6 likely began development, Apple's R&D budget was under $1.5 billion, but when the A9 started development, that same budget was probably north of $2.5 billion. Now, not all of Apple's R&D goes toward chip development, but I would be very surprised if a big chunk of that step up weren't related to chip development.

What's the ultimate point here?
The point I'm trying to make is that the impressive chips that Apple has packed its currently released iDevices with likely didn't have anywhere near the resources dedicated to them as what future Apple chips will have. With a much larger budget and many of the world's best chip engineers all working on just a handful of processors, we haven't even come close to seeing what Apple's mobile processors can do. I, for one, can't wait to see what Apple has planned for the A9 -- and beyond. 

Ashraf Eassa owns shares of ARM Holdings and Intel. The Motley Fool recommends Apple and Intel. The Motley Fool owns shares of Apple, Intel, and International Business Machines. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.