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iPad CPU may find its way into next-gen iPhone

Since the announcement that the iPad comes with a 1 GHz A4 chip developed and owned by Apple (thanks, no doubt, to their acquisition of chipmaker PA Semi), one thing's been on a lot of people's minds: when will this chip make it to the iPhone?

The iPhone 3GS runs on an 833 MHz Samsung chip, that, presumably to increase battery life, is underclocked to 600 MHz. While this is better than the original iPhone and iPhone 3G's 620 MHz CPU (underclocked to about 412 Mhz), there's still plenty of room for improvement. Analysts fully expect that improvement will come either from the A4 chip itself or a lower-powered variant of it designed for the iPhone's smaller screen and battery.

Early impressions of the iPad's speed from people who have actually handled one are that the device is far faster than any iPhone or iPod touch released so far, with applications opening "instantly," and provides far smoother graphics performance. With Apple now designing and implementing its own "system on a chip" CPU for the iPad, it seems very likely this will be one of many iPad features that will trickle down to Apple's smaller mobile devices. Once the iPad actually finds its way to consumers (and teardown sites), we'll have a much better idea of what Apple's A4 chip is capable of. As for the next-gen iPhone's CPU, I'm placing my bets on an A4 variant rather than the full iPad CPU, with an operational speed in the neighborhood of 800 - 850 MHz -- more than twice the speed of the iPhone 3G.

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Hardware iPhone iPod touch

Since the announcement that the iPad comes with a 1 GHz A4 chip developed and owned by Apple (thanks, no doubt, to their acquisition of...
 

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TheMacBox

ARE YOU SERIOUS? The iPhone 3GS already has overheating problems. They should put an A4 M or something in there.

January 30 2010 at 6:00 AM Report abuse rate up rate down Reply
aardivark

Are you saying after paying 200 something million dollars for PA Semi, Apple might use it in more than one product and stop buying competing chips from third party chip makers? I would never have figured that out! Thanks.

January 30 2010 at 1:17 AM Report abuse rate up rate down Reply
tonyunreal

I'm actually amazed they managed to get 10 hours of video playing on a device that thin. The iPhone/iPod Touch won't consume that much of power since they have smaller screens, and they won't use up all the horsepower on daily tasks.

I would take a wild guess that, if Apple decides to put A4 in the fourth generations of iPhone and iPod Touch, it will be underclocked to a degree that the devices can handle 3d games no worse than iPhone 3GS but not significantly better than it either like we saw on the iPad keynote either. Support for 720p H.264 main profile won't be there either I think.

The key feature to their success this year would be multitasking, I don't think they can sell as many iPads, iPhones G4 and iPod touch G4 this year as before if multitasking didn't make it into iPhone OS 4.0.

January 29 2010 at 11:15 PM Report abuse rate up rate down Reply
Charles

I may be out of my depth here, but isn't comparing the clock speed of two different chips kind of pointless and irrelevant? ie: Intel vs. AMD, PowerPC vs Intel, etc.

On another note concerning battery life, I think we'll find that this thing is half battery once someone (ifixit or whatever) has the chance to crack it open, which would explain the 10hr battery life more than it would the power saving nature of the CPU.

January 29 2010 at 11:11 PM Report abuse rate up rate down Reply
1 reply to Charles's comment
aardivark

I would think it would be more than half battery because the circuitry will probably be about as big as the iPhone's.

January 30 2010 at 1:20 AM Report abuse rate up rate down Reply
Mike Eliss

I'd make no wagers on which chip will hit the next iPhone.

The variables are size, power consumption, and performance. If Apple's own chips don't yet fit the bill, they'll have no problem going to an external vendor.

Apple will only switch for a chip that better serves their overall goals.

Regarding cameras: I'd much rather have a better sensor than than either an LED "flash" (which is next to useless) or a crappy high-megapixel sensor.

I'd be extremely happy with a 2 MP sensor with great low-light sensitivity and a great lens. Sadly, virtually all of the component offerings are designed to be cheap, not good: "5 MP for $3.25 each (qty 1MM)"

January 29 2010 at 9:09 PM Report abuse rate up rate down Reply
Solar servant

Based on the underclocked numbers stated in the article, the new chip would be less of an upgrade than the 3G to 3GS cycle:

600 ÷ 412 = 1.46
850 ÷ 600 = 1.42

January 29 2010 at 8:46 PM Report abuse rate up rate down Reply
David Frantz

I doubt very much that the A4 will find it's way into an iPhone. That mostly due to rumors indicating that PA was split in two to do iPhone and tablet chips. Further A4 likely has features that don't make sense in an iPhone, combine that with Apples interest in lowering hardware costs, you thus end up with an iPhone tailored chip.

Still that chip has the potential to be very powerful and very low power. I could see Apple coming close to doubling performance again with an extension in battery lifetimes. In fact I'm so excited that I'm milking my 3G so that it will be easy to move to the next iPhone rev. I believe it will be a big jump forward again.

Now what will that chip be called, I'm with the others thinking A2. I'm also thinkng there might be an indication there with respect to the number of cores. Well we can be hopeful. It will be most interesting to see the next rev iPhone and iPad teardowns side by side. I just have this feeling that Apple will end up with more of the iPhone in the SoC than the IPad integrates it's features. Outside of the iPhone this could make for one interesting iPod Touch too. The higher integration of common features just means more room for features outside of the SoC.

Dane

January 29 2010 at 8:19 PM Report abuse rate up rate down Reply
AppleZilla

God, I hope so. I held off on buying the 3GS and stuck with my 2008 3G. I want a major upgrade with screaming speed in 2010. C'mon, Summer!

January 29 2010 at 7:55 PM Report abuse rate up rate down Reply
1 reply to AppleZilla's comment
Pibroch

Going from a 3G to the 3GS is night and day. I use my wife's 3G and wonder how I got on with the constant sluggishness.

January 29 2010 at 10:34 PM Report abuse rate up rate down Reply
Sad Sack

My wish list - a 4th-gen iPhone with the following:
- 1GHz chip
- Flash support
- 8MP camera (but I'll settle for 5MP) with flash zoom capability
- 4" AMOLED display (more energy efficient, plus allows for larger battery)
- Android 2.1 (just kidding ;-))
- support for WiMax 4G networks (in other words, a break from AT&T exclusivity)
- bigger, better speakers
- HD radio tuner

Reality - the next iPhone:
- 1GHz chip possible, but will probably be underclocked to 800 MHz
- no Flash (Apple will never allow Hulu to cut into its iTunes sales)
- 3 or 4MP camera, no flash, no zoom
- 3.5" LCD display (no different than the current one - Apple would much rather make you get an iPad)
- 3G only (4G networks just haven't matured enough, and are too unpredictable)
- same speakers (can't have customers stop paying extra for accessories, can we?)
- No radio tuner of any kind, unless it takes you right to iTunes to pay for a song if you like it

January 29 2010 at 7:50 PM Report abuse rate up rate down Reply
3 replies to Sad Sack's comment
Terence F

Is there confirmation anywhere from Apple that the A4 runs the ARM Instruction Set? It's a pretty reasonable assumption but I have not seen anything official.

January 29 2010 at 7:28 PM Report abuse rate up rate down Reply
2 replies to Terence F's comment
Quinn Taylor

No official (public) confirmation from Apple to my knowledge, but given the performance of iPhone apps on iPad, I agree that it's safe to assume it's ARM-based, not emulation. This approach leverages the existing iPhone OS work (tuned for ARM chips) the best. Plus, Apple selected ARM for iPhone, presumably because they like what they see in it. I don't see them moving to something else on a whim.

January 29 2010 at 11:31 PM Report abuse rate up rate down Reply
William

My understanding is that the A4 is an ARM CPU and GPU; the Cortex A9 CPU and Mali GPU.

February 01 2010 at 4:12 PM Report abuse rate up rate down Reply
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