Specifications

BMA180
Preliminary data sheet
Bosch Sensortec
Rev. 1.0 Page 5 / - proprietary information - 06 March 2009
© 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.
Specifications within this document are preliminary and subject to change without notice. Document is not intended for publication.
TABLE OF CONTENTS
1 SPECIFICATION....................................................................................................................................8
2 ABSOLUTE MAXIMUM RATINGS..................................................................................................... 14
3 BLOCK DIAGRAM ............................................................................................................................. 15
4 OPERATION MODES......................................................................................................................... 16
4.1 NORMAL OPERATIONAL MODE ....................................................................................................... 16
4.2 SLEEP MODE ............................................................................................................................... 16
4.2.1 General information.............................................................................................................. 16
4.2.2 Current consumption using duty cycling............................................................................... 17
4.3 WAKE-UP MODE........................................................................................................................... 18
4.3.1 General information.............................................................................................................. 18
4.3.2 Current consumption in wake-up mode................................................................................ 18
5 DATA CONVERSION......................................................................................................................... 21
5.1 ACCELERATION DATA ................................................................................................................... 21
5.2 TEMPERATURE MEASUREMENT ..................................................................................................... 21
6 INTERNAL LOGIC FUNCTIONS........................................................................................................22
6.1 FREE-FALL LOGIC (OR LOW-G INTERRUPT LOGIC) ............................................................................ 22
6.2 HIGH-G LOGIC.............................................................................................................................. 23
6.3 SLOPE DETECTION (OR ANY MOTION DETECTION)............................................................................ 23
6.4 TAP SENSING............................................................................................................................... 23
6.5 ALERT MODE............................................................................................................................... 23
7 GLOBAL MEMORY MAP................................................................................................................... 24
7.1 GLOBAL MEMORY MAPPING: GENERAL INFORMATION ....................................................................... 25
7.2 REGISTERS ................................................................................................................................. 26
7.3 PROGRAMMING OF THE CALIBRATION PARAMETERS......................................................................... 26
7.4 REGISTER ARITHMETIC ................................................................................................................. 27
7.5 EEPROM................................................................................................................................... 27
7.5.1 General information.............................................................................................................. 27
7.5.2 EEPROM reading ................................................................................................................. 27
7.5.3 EEPROM writing................................................................................................................... 27
7.5.4 EEPROM protection ............................................................................................................. 28
7.5.5 EEPROM content upon delivery (after production test) ....................................................... 28
7.5.6 ee_w_flag - EEPROM-written flag........................................................................................ 29
7.5.7 EEPROM Endurance............................................................................................................ 29
7.6 IMAGE WRITING ............................................................................................................................ 29
7.7 IMAGE READING ........................................................................................................................... 29
7.8 GENERAL FUNCTIONAL SETTINGS .................................................................................................. 30
7.8.1 range..................................................................................................................................... 30
7.8.2 bw ......................................................................................................................................... 30
7.8.3 mode_config ......................................................................................................................... 31
7.8.4 readout_12bit........................................................................................................................ 32
7.8.5 smp_skip (sample skipping)................................................................................................. 32
7.8.6 shadow_dis........................................................................................................................... 32