Apple has opted to equip the iPhone 6 and 6 Plus with two separate accelerometers, as discovered in Chipworks' comprehensive iPhone 6 and 6 Plus teardown. There's a three-axis Bosch BMA280 accelerometer and what Chipworks believes is a MPU-6700 six-axis accelerometer from InvenSense.
According to Chipworks, Apple may have decided to incorporate two accelerometers into the iPhone 6 and 6 Plus to both minimize power consumption and "improve the overall user experience."
The InvenSense accelerometer has a range of functions, allowing it to operate in several different modes, but it can draw more power than the Bosch accelerometer due to its higher sensitivity. The maximum sensitivity of the InvenSense is at 16684 LSB/g, much higher than the Bosch's 4096.
The InvenSense device can operate as a six axis inertial sensor, or as either a three-axis gyroscope or a three-axis accelerometer. It is rated to consume 3.4 mA in the six-axis mode, 3.2 mA in the gyroscope mode and 450 µA in the accelerometer normal mode. By contrast, the Bosch device operates as a 3-axis accelerometer only and it consumes 130 µA of current in the accelerometer normal mode. Both devices offer two low power levels of operation for the accelerometer function. The InvenSense device actually consumes less current in its lowest power mode, with a 1 Hz update rate.
The main benefit of the InvenSense is full six-axis integration of the data by the on-chip digital motion processor (DMP). This will provide a direct benefit for gaming and other applications that need sophisticated inertial sensing capabilities. In addition the InvenSense provides significantly higher sensitivity than the Bosch device. The price however, is higher power consumption.
The Bosch accelerometer is able to operate at a lower power than the InvenSense and it has a "much faster" cold start up time, at 3ms compared to 30ms, allowing it to be used when complete six-axis integration is unnecessary. Chipworks speculates that it may be used for tasks where higher sensitivity is unneeded, perhaps for rotating the screen from landscape to portrait mode or for pedometer functionality.
According to Chipworks, the inclusion of two accelerometers in the iPhone 6 and 6 Plus is an example of Apple's "elegant engineering." A single InvenSense accelerometer would have enabled the device to work perfectly well, but the addition of the Bosch accelerometer allows for lower power consumption in the appropriate situations.
OK, so I got the obvious, witty Android joke out of the way. Here's the real point:
A lot of people look at these devices being released every year with the sense that all these companies do (LG, Samsung, and others included) is slap the same old components on the inside and change the case or screen size. In reality, they are re-architecting a lot of the technology every year or two. This is not easy to do.
Only when we get tear downs and such do we get the full story of everything going on inside the shell. These guys are doing amazing work to move technology forward. The result is better devices and increased convenience/utility for the user.
The engineers that put this particular solution together aren't going to be recognized or win any awards, but they're doing great things.
The iPhone 12 and iPhone 12 Pro arrived last October in a range of color options, with entirely new hues available on both devices, as well as some popular classics. The 12 and 12 Pro have different color choices, so if you have your heart set on a particular shade, you might not be able to get your preferred model in that color.
iPhone 12 mini and iPhone 12
The iPhone 12 mini and iPhone 12...
To commemorate the tenth anniversary of the iPhone, Apple marketing chief Phil Schiller sat down with tech journalist Steven Levy for a wide-ranging interview about the smartphone's past, present, and future.
The report first reflects upon the iPhone's lack of support for third-party apps in its first year. The argument inside Apple was split between whether the iPhone should be a closed...
Wednesday August 25, 2021 7:48 am PDT by Joe Rossignol
Starting with iOS 15, iPadOS 15, and macOS Monterey, users with a paid iCloud+ storage plan can personalize their iCloud email address with a custom domain name, such as johnny@appleseed.com, and the feature is now available in beta.
iCloud+ subscribers interested in setting up a custom email domain can visit the beta.icloud.com website, select "Account Settings" under their name, and select ...
With the launch of Apple's iPhone 13 lineup believed to be just a few weeks away, we have compiled all of the coherent rumors from our coverage over the past year to build a full picture of the features and upgrades coming to the company's new smartphones.
For clarity, only explicit improvements, upgrades, and new features compared to the iPhone 12 lineup are listed. It is worth noting that...
The iPhone 13 will feature low earth orbit (LEO) satellite communication connectivity to allow users to make calls and send messages in areas without 4G or 5G coverage, according to the reliable analyst Ming-Chi Kuo.
In a note to investors, seen by MacRumors, Kuo explained that the iPhone 13 lineup will feature hardware that is able to connect to LEO satellites. If enabled with the relevant...
Amazon today introduced new low prices on the M1 MacBook Air for both 256GB and 512GB storage options. To start, you can get the 256GB model for $849.99, down from an original price of $999.00.
Note: MacRumors is an affiliate partner with Amazon. When you click a link and make a purchase, we may receive a small payment, which helps us keep the site running.
Only Silver and Gold are...
New MacBook Pro models are coming at WWDC, according to leaker Jon Prosser who has a mixed track record when it comes to predicting Apple's plans.
Subscribe to the MacRumors YouTube channel for more videos. Prosser provided no additional information, but there are new 14 and 16-inch MacBook Pro models in the works. The new MacBook Pros will feature the most radical redesign to the MacBook Pro ...
Tuesday October 24, 2017 2:03 pm PDT by Juli Clover
A bug in the built-in Calculator app in iOS 11 is getting some major attention this week, despite the fact that it's been around since iOS 11 was in beta testing.
At issue is a calculator animation that causes some symbols to be ignored when calculations are entered in rapid succession. You can try it for yourself: Type 1+2+3 and then the equals sign into the Calculator app quickly.
Due to...
Tuesday August 31, 2021 8:25 am PDT by Joe Rossignol
Update 9/7/21: "Being James Bond" is now available to watch through the Apple TV app. Ahead of the theatrical release of James Bond film "No Time To Die" on October 8 in the United States, a 45-minute retrospective titled "Being James Bond" will be available to watch for free through the Apple TV app, according to Deadline.
The story from MGM is said to feature Daniel Craig reflecting ...
Tuesday August 31, 2021 2:15 am PDT by Tim Hardwick
Recent sightings of a notchless iPhone in highly popular Apple TV+ comedy "Ted Lasso" have led to sensational headlines suggesting this is a canny bit of product placement on Apple's part and that the iPhone 13 will be notchless. In actuality – and this could go without saying – the phone in question is very likely just showing a poorly superimposed display added in post-production.
Notchless ...
When Apple released iOS 14.5 in April, it introduced the ability to unlock your iPhone with Face ID while wearing a mask, as long as you are wearing an Apple Watch. Here are some troubleshooting tips.
New features for FaceTime calls, tools to reduce distractions, a new notifications experience, added privacy features, complete redesigns for Safari, Weather, and Maps, and more.
/article-new/2014/09/accelerometers.jpg?lossy)
/article-new/2014/09/specificationcomparison.jpg?lossy)
Top Rated Comments
A lot of people look at these devices being released every year with the sense that all these companies do (LG, Samsung, and others included) is slap the same old components on the inside and change the case or screen size. In reality, they are re-architecting a lot of the technology every year or two. This is not easy to do.
Only when we get tear downs and such do we get the full story of everything going on inside the shell. These guys are doing amazing work to move technology forward. The result is better devices and increased convenience/utility for the user.
The engineers that put this particular solution together aren't going to be recognized or win any awards, but they're doing great things.
It is exactly this type of clever engineering which is why Apple don't need to include 2Gb of ram just to look good in the specs race.