Apple Likely Equipped the iPhone 6 With Two Accelerometers to Minimize Power Consumption

Apple Likely Equipped the iPhone 6 With Two Accelerometers to Minimize Power Consumption

Posted by · 16602 views · Translate
Recent iPhone 6 teardowns reveal that the iPhone 6 features two accelerometers, a six-axis InvenSense combination gyroscope-accelerometer and a Bosch BMA280 three-axis accelerometer. The big question has been why Apple would need two accelerometers in the new iPhone. After some analysis Chipworks believes the answer is power management.

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 InvenSense can provide full six-axis integration of the data by the on-chip digital motion processor which is great for gaming and other applications that need sophisticated inertial sensing capabilities and higher sensitivity.

However, the Bosch device operates at lower power and has much faster start up time. This makes it good for situations where full six-axis integration is not required and where lower sensitivity is acceptable, for example for purposes such as screen orientation and pedometer functionality.

Hit the link below for more details...

Read More


Apple Likely Equipped the iPhone 6 With Two Accelerometers to Minimize Power Consumption
it wasnt me - September 29, 2014 at 11:34am
Two Accelerometers to minize wallhugging
it wasnt me - September 29, 2014 at 11:35am
*Minimize
Jeroen - September 28, 2014 at 9:25am
Bosch is making the best hardware in the world I think.. Real German technology! IPhone 6 don't warm up at all...
NoGoodNick - September 27, 2014 at 7:38pm
A situation where more (hardware) is less (overhead). I'm glad that someone is considering power usage. My DVR and Cable boxes chew my power bill up every month!
Recent