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PDF BMA250 Data sheet ( Hoja de datos )
| Número de pieza | BMA250 | |
| Descripción | triaxial acceleration sensor | |
| Fabricantes | Bosch | |
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BMA250
Digital, triaxial accelerBaMAti2o50n sensor
Data sheet
Data sheet
Bosch Sensortec
Bosch Sensortec
BMA250 Data sheet
Ordering code
Please contact your Bosch Sensortec representative for the ordering code
Package type
12-pin LGA
Document revision
1.15
Document release date
31 May 2012
Document number
BST-BMA250-DS002-05
Technical reference code(s) 0 273 141 121
Notes
Data in this document are subject to change without notice. Product photos
Rev. 1.15
and picPtuargees 1ar/enfootrfoillrupsutrbaltiisohninpgurposes only and may 3d1iffe- rMfraoym- 2th0e12real
product‟s appearance.
© Bosch Sensortec GmbH reserves allNrigohttisnetevenndiendthfeoervpenutbolifsinhdinusgt.rial property rights. We reserve all rights of disposal such
as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.
Note: Specifications within this document are subject to change without notice.
1 page  
BMA250
Data sheet
Bosch Sensortec
5. REGISTER DESCRIPTION .....................................................................................................................35
5.1 GENERAL REMARKS .............................................................................................................................35
5.2 REGISTER MAP .....................................................................................................................................36
5.3 CHIP ID................................................................................................................................................37
5.4 ACCELERATION DATA ...........................................................................................................................37
5.5 TEMPERATURE DATA ............................................................................................................................39
5.6 STATUS REGISTERS ..............................................................................................................................39
5.7 G-RANGE SELECTION ............................................................................................................................41
5.8 BANDWIDTHS .......................................................................................................................................41
5.9 POWER MODES.....................................................................................................................................41
5.10 SPECIAL CONTROL SETTINGS ............................................................................................................. 42
5.11 INTERRUPT SETTINGS ........................................................................................................................ 42
5.12 SELF-TEST .........................................................................................................................................49
5.13 NON-VOLATILE MEMORY CONTROL (EEPROM CONTROL) ....................................................................49
5.14 INTERFACE CONFIGURATION ...............................................................................................................50
5.15 OFFSET COMPENSATION .....................................................................................................................50
6. DIGITAL INTERFACES ..........................................................................................................................54
6.1 SERIAL PERIPHERAL INTERFACE (SPI) ..................................................................................................55
6.2 INTER-INTEGRATED CIRCUIT (I²C) .........................................................................................................58
7. PIN-OUT AND CONNECTION DIAGRAM............................................................................................. 62
7.1 PIN-OUT.............................................................................................................................................. 62
7.2 CONNECTION DIAGRAM 4-WIRE SPI.......................................................................................................63
7.3 CONNECTION DIAGRAM 3-WIRE SPI.......................................................................................................64
7.4 CONNECTION DIAGRAM I2C ...................................................................................................................65
8. PACKAGE...............................................................................................................................................66
8.1 OUTLINE DIMENSIONS ...........................................................................................................................66
8.2 SENSING AXES ORIENTATION ................................................................................................................67
8.3 LANDING PATTERN RECOMMENDATION ................................................................................................. 68
8.4 MARKING .............................................................................................................................................69
8.4.1 Mass production samples........................................................................................................... 69
8.4.2 Engineering samples .................................................................................................................. 69
8.5 SOLDERING GUIDELINES .......................................................................................................................70
8.6 HANDLING INSTRUCTIONS.....................................................................................................................71
8.7 TAPE AND REEL SPECIFICATION ............................................................................................................71
8.7.1 Orientation within the reel ............................................................................................................72
Rev. 1.15
Page 5 / not for publishing
31 - May - 2012
© Bosch Sensortec GmbH reserves all rights even 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 symbol are registered trademarks of Robert Bosch GmbH, Germany.
Note: Specifications within this document are subject to change without notice.
5 Page 
BMA250
Data sheet
Bosch Sensortec
both supply voltages. In case the I²C interface shall be used, a direct electrical connection
between VDDIO supply and the PS pin is needed in order to ensure reliable protocol selection
(see section 4.2 Operational modes).
4.2 Operational modes
Depending on the configuration the BMA250 is able to operate in two different operational
modes:
General mode: The device is acting as a slave on a digital interface (SPI or I²C) and is
controlled by the external bus master (e.g. µC). The master gets measurement data and
status information from the device through the digital interface. In particular, the master
can configure the interrupt controller and read out the interrupt status registers.
Moreover, it can freely configure and use the two interrupt pins (INT1, INT2). Several
interrupts may be enabled in parallel.
Dedicated mode: The dedicated mode allows the sensor to be operated as a stand-
alone device in a simple µC-less system without abandon of the interrupt functionality.
No digital interface is needed and, as a consequence, no measurement data can be
read from the device. Instead of the digital interface the internal interrupt engine with its
default setting is used. The interrupt status is mapped onto dedicated output pins. One
out of three different sub-modes can be chosen: A) orientation recognition, B) tap
sensing or C) slope (any-motion) detection. Only one interrupt at a time can be
assigned.
The selection of the operational mode is done during start-up or reset by the state of the PS pin.
If PS is floating, the dedicated mode is selected. A defined digital state selects the general
mode. All pads are in input mode (no output driver active) during the start-up sequence until the
operational mode and, in case of the general mode, the interface type is selected. The start-up
sequence is run after power-up and after reset.
Figure 2 illustrates the selection of the different operational modes:
reset
Dedicated Mode
yes
check configuration pins
Table 4 & Table 5
no
PS floating?
General Mode
no
Sub-Mode A
Orientation Sens.
Orientation Interrupt
is enabled
Sub-Mode B
Tap Sens.
Tap sensing Interrupt
is enabled
Sub-Mode C
Slope Sens.
Any-Motion Interrupt
is enabled
General Mode
with I²C
One or more
interrupts can be
configured via I²C
Figure 2: Operational mode selection
PS = 0?
yes
General Mode
with SPI
One or more
interrupts can be
configured via SPI
Rev. 1.15
Page 11 / not for publishing
31 - May - 2012
© Bosch Sensortec GmbH reserves all rights even 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 symbol are registered trademarks of Robert Bosch GmbH, Germany.
Note: Specifications within this document are subject to change without notice.
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet BMA250.PDF ] | |
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