General description
The BMA220 is an ultra small triaxial, low-g accelera-
tion nsor with digital interfaces, aiming for low-
power consumer market applications.
The BMA220 allows measurement of accelerations
认为的英文短语
in 3 perpendicular axes and thus ns tilt, motion,
呈现的反义词shock and vibration in cell phones, handhelds, com-
puter peripherals, man-machine interfaces, virtual
reality features and game controllers.
BMA220 target applications
Display profile switching (e.g.portrait/landscape)
f
Tap nsing function
f
Menu scrolling
f
Gaming
潮汕老爷f
Advanced power management for mobile devices
f
Shock detection
刘邦哪里人
f
Sensor operation
With its size of only 2 mm x 2 mm the BMA220 repre-
nts a new generation of digital acceleration n-
sors. The BMA220 integrates a multitude of features
that facilitates its u especially in the area of motion
detection applications, such as device orientation
detection, gaming, HMI and menu browr control.
The BMA220 is highly configurable in order to give
the designer full flexibility when integrating the n-
sor into his system. All features can be t by soft-
ware via the digital interface. This implies also that
缩写的英文even once a hardware platform with the BMA220
exists, it can be modified by software in order to
expand the capabilities and u cas.
As already introduced with the successful BMA150
and SMB380 digital acceleration nsors, also for
岩浆房the BMA220 the g-ranges, bandwidths and interrupt
parameters can be ur programmed via the rial
digital interface. Here the ur can choo between
I2C and SPI (3-wire/4-wire) interface modes.
Data & Specification subject to change without notice
Doc.-Number: BST-BMA220-FL000-01 / Version_1.2_082010
2© Bosch Sensortec GmbH rerves all rights in the event of industrial property rights. We rerve all rights of disposal such as copying and passing on to third par-ties. BOSCH and the symbols are registered trademarks of Robert Bosch GmbH, Germany.
Headquarters
Bosch Sensortec GmbH Gerhard-Kindler-Stras 872770 Reutlingen · Germany Telephone +49 7121 3535 900Fax +49 7121 3535 909
One of the key elements of the BMA220 is the intelligent interrupt engine that gives the hard- and software designer full control. Various motion detec-tion scenarios can be identified by the BMA220 and signaled to the system via a simple interrupt pin.
By using the digital rial interface, the exact details of the motion event that triggered the interrupt can be read-out.
Following motion detection u ca scenarios are supported by the interrupt engine:Any-motion (slope) detection f Tap nsing
f Orientation change recognition f Low-
g / high-g detection f Data-ready f Self-wake-up
f The interrupts can be conveniently configured by the ur and thus perfectly support the integration of the BMA220 into the ur’s system environment.
Another important feature of the BMA220 accelera-tion nsor is the power management module. This module allows optimizing the nsor’s power con-sumption in-line with the specific ur requirements. Thus, it is not necessary to operate the nsor at full power for all application scenarios all the time. For some u cas the power consumption drastically shrinks to just a fraction of what would be required in full performance mode.张一山年龄
Moreover this feature of the BMA220 allows for an intelligent system power management and thus signi-ficant reduction of the whole system’s power con -sumption. In particular, this helps increasing battery life-time of any kind of mobile device.
敢于尝试In the unique …dedicated I/O“ modes the BMA220 can be operated as a stand-alone device without requiring
a µController.
