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.
While past rumors have indicated the upcoming second-generation AirPods Pro will feature a built-in heart rate and body temperature sensor, Bloomberg's Mark Gurman has cast doubt on those rumors turning out to be true, saying instead such a feature is unlikely to come anytime soon.
"Over the past few months, there have been rumors about this year's model gaining the ability to determine a...
Apple is working on an Apple Watch Series 8 model with a larger display, according to DSCC's Ross Young and Haitong International Securities's Jeff Pu.
In October last year, Young suggested that the Apple Watch Series 8 could come in three display sizes. Now, responding to a query about the rumor on Twitter, Young claims that the additional display size joining the Apple Watch lineup will be ...
The upcoming launch of Apple's redesigned MacBook Air with the M2 chip has some Windows laptop manufacturers "worried" that sales of Intel-based laptops will be negatively affected, according to industry sources cited by DigiTimes.
"A Wintel brand vendor pointed out that at a price point of US$1,000-$1,500, the MacBook Air will crowd out other high-end notebooks," the report claims, with...
European Union lawmakers have approved landmark legislation to heavily regulate Apple, Google, Meta, and other big tech firms.
The Digital Markets Act (DMA) and Digital Services Act (DSA) were proposed by the European Commission in December 2020. Now, collected in a "Digital Services Package," the legislation has been formally adopted by the European Parliament and seeks to address...
Apple today announced that the new MacBook Air equipped with the M2 chip will be available to order starting Friday, July 8 at 5 a.m. Pacific Time. Apple said deliveries to customers and in-store availability will begin Friday, July 15.
MacRumors exclusively reported that Apple planned to launch the new MacBook Air on July 15, and the date has now been confirmed by Apple. Customers will be...
The M2 MacBook Pro has started making its way into customers' hands and we're learning more about how it performs in a variety of situations, but all eyes are really on the upcoming M2 MacBook Air which has seen a complete redesign and should be arriving in a couple of weeks.
Other top stories this week included a host of product rumors including additional M2 and even M3 Macs, an updated...
Wednesday July 6, 2022 10:00 am PDT by Joe Rossignol
Apple today announced a new Lockdown Mode coming to the iPhone, iPad, and Mac with iOS 16, iPadOS 16, and macOS Ventura. Apple says the optional security feature is designed to protect the "very small number" of users who may be at risk of "highly targeted cyberattacks" from private companies developing state-sponsored spyware, such as journalists, activists, and government employees.
Apple...
Apple today released new firmware for the Siri Remote designed for the Apple TV, updating the software from version 9M6772 to 10M1103. The software is for the redesigned Siri Remote that was released in May 2021, aka the gray remote with the updated interface. In the Apple TV settings, the new firmware will display as 0x0070, up from 0x0061. There is no word on what's new with the Apple TV...
Apple on May 16 released iOS 15.5 and iPadOS 15.5, bringing improvements for Podcasts and Apple Cash, the ability to see Wi-Fi signal of HomePods, dozens of security fixes, and more.
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.