BMA220 Digital, triaxial acceleration sensor Bosch Sensortec General description The BMA220 is an ultra small triaxial, low-g accelera- The BMA220 is highly configurable in order to give tion sensor with digital interfaces, aiming for low- the designer full flexibility when integrating the sen- power consumer market applications. sor into his system. All features can be set by soft- The BMA220 allows measurement of accelerations ware via the digital interface. This implies also that in 3 perpendicular axes and thus senses tilt, motion, even once a hardware platform with the BMA220 shock and vibration in cell phones, handhelds, com- exists, it can be modified by software in order to puter peripherals, man-machine interfaces, virtual expand the capabilities and use cases. reality features and game controllers. As already introduced with the successful BMA150 and SMB380 digital acceleration sensors, also for BMA220 target applications the BMA220 the g-ranges, bandwidths and interrupt ff Display profile switching (e.g.portrait/landscape) parameters can be user programmed via the serial ff Tap sensing function digital interface. Here the user can choose between ff Menu scrolling I2C and SPI (3-wire/4-wire) interface modes. ff Gaming ff Advanced power management for mobile devices ff Shock detection Technical data Sensor operation BMA220 preliminary With its size of only 2 mm x 2 mm the BMA220 repre- Sensitivity axes sents a new generation of digital acceleration sen- Measurement range sors. The BMA220 integrates a multitude of features x/y/z 2 g, 4 g, 8 g, 16 g (switchable via SPI/I2C) that facilitates its use especially in the area of motion Sensitivity 2 g: 16 LSB/g detection applications, such as device orientation (calibrated) 4 g: 8 LSB/g 8 g: 4 LSB/g detection, gaming, HMI and menu browser control. 16 g: Resolution 2 LSB/g 6 bit 62.5 mg (2 g range) Key features BMA220 Nonlinearity 2% FS ff User programmable g-range and bandwidth Zero-g offset 95 mg ff Low-power consumption Bandwidth ff SPI (3-wire/4-wire) and IC interface 1 kHz ... 32 Hz (switchable via SPI/IC) ff User programmable interrupt engine Digital input / output ff Ultra-low-power auto-wake-up mode Supply voltage ff Self-test capability I/0 supply voltage ff Ultra small package Temperature range ff RoHS compliant, halogen-free LGA package SPI & IC, interrupt pin 1.8 V 1.62 V ... 3.6 V -40C ... +85C 2 mm x 2 mm x 0.98 mm 2 | Bosch Sensortec | BMA220 BMA220 Pin configuration (top view) By using the digital serial interface, the exact details of the motion event that triggered the interrupt can be read-out. Following motion detection use case scenarios are supported by the interrupt engine: ff Any-motion (slope) detection ff Tap sensing ff Orientation change recognition ff Low-g / high-g detection ff Data-ready ff Self-wake-up The interrupts can be conveniently configured by the user and thus perfectly support the integration of the BMA220 into the user's system environment. Pin Name Function No. Another important feature of the BMA220 acceleration sensor is the power management module. This module allows optimizing the sensor's power con- 1 SDO SPI serial data output 2 SDx I C / SPI serial data in/out sumption in-line with the specific user requirements. V DDIO (SDI, SDA, SDO) I/O supply voltage power for all application scenarios all the time. For 3 2 (1.62 ... 3.6V) 4 V DDD Digital supply voltage (1.8V) 5 INT Interrupt output 6 DNC Do not connect! 7 V DDA Analog supply voltage 8 GND Shared ground 9 GND Shared ground 10 CSB SPI chip select 11 PS I2C / SPI select pin 12 SCK SCL (I2C serial clock) SCK (SPI serial clock) Thus, it is not necessary to operate the sensor at full some use cases the power consumption drastically shrinks to just a fraction of what would be required in full performance mode. Moreover this feature of the BMA220 allows for an intelligent system power management and thus significant reduction of the whole system's power consumption. In particular, this helps increasing battery life-time of any kind of mobile device. In the unique dedicated I/O" modes the BMA220 can be operated as a stand-alone device without requiring a Controller. One of the key elements of the BMA220 is the intelligent interrupt engine that gives the hard- and software designer full control. Various motion detection scenarios can be identified by the BMA220 and signaled to the system via a simple interrupt pin. Headquarters Bosch Sensortec GmbH Gerhard-Kindler-Strasse 8 72770 Reutlingen * Germany Telephone +49 7121 35359 00 Fax +49 7121 35359 09 contact@bosch-sensortec.com www.bosch-sensortec.com Data & Specification subject to change without notice Doc.-Number: BST-BMA220-FL000-01 / Version_1.2_082010 (c) Bosch Sensortec GmbH reserves all rights in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. BOSCH and the symbols are registered trademarks of Robert Bosch GmbH, Germany.