Bosch MAN-REG-X-08 Specifications download pdf (Page 31)

Data sheet

BMA220

Page 31

BST-BMA220-DS003-08 | Revision 1.15 | August 2011 Bosch Sensortec

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.

6. Operation modes

Depending on the configuration the BMA220 is able to operate in two different types of modes

 General mode: A serial interface is active (SPI or I

C). Several interrupt engines may be

activated in parallel. Through the serial interface, the external master (e.g. μC) can

configure the interrupts of the BMA220 and read-out information about the current

interrupt status.

 Dedicated mode: No serial interface is present. Internal default settings for all interrupt

engines must be used. In these modes, only one interrupt engine can be active at a

time. Currently, dedicated modes exist for the orientation interrupt, the tap sensing

interrupt and the any-motion interrupt. The dedicated mode allows the sensor to be

operated as a stand alone device, e.g. without any μC and without dealing with any

acceleration data. So, in a very user friendly and convenient way taps/double-taps,

orientation changes and wake-ups can be processed by a simple μC-less system.

A flow chart of the different modes is depicted in figure 11:

General mode with

reset

Wake-up modeTip-tap mode Orientation mode

Any of the

dedicated

mode invoked?

Any-motion

interrupt is

enabled

Tip-tap

interrupt is

enabled

orientation

interrupt is

enabled

One or more

interrupts can be

configured via I

yes

PS = ´0´?

General mode with

SPI

One or more

interrupts can be

configured via SPI

yes

Figure 11: Interrupt modes

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 62 63

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Bosch MAN-REG-X-08 Specifications Page 31

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