Bosch BMA400 Instruction Manual

Preliminary Data Sheet
BMA400
Digital, triaxial acceleration sensor
Preliminary Data Sheet BMA400
Part number(s)
0 273 141 xyz
Document revision
0.1
Release date
03 November 2017
Document number
BST-BMA400-DS000-00
Notes
Specifications are preliminary and subject to change without notice.
Product photos and pictures are for illustration purposes only and may
differ from the real product’s appearance.
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Preliminary Data Sheet
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Confidential
BST-BMA400-DS000-00 | Version 0.1 | November 2017 Bosch Sensortec
©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.
BMA400
12 bit, digital, triaxial acceleration sensor with smart on-chip motion and position-triggered interrupt
features.
Key features
Small package size LGA package (12 pins), footprint 2mm x 2mm,
height 0.95 mm
Ultra-low power Low current consumption of data acquisition
without compromising on performance
(< 14 µA with highest performance)
Programmable functionality Acceleration ranges ±2g/±4g/±8g/±16g
Low-pass filter bandwidths = 0.48*ODR
up to a max. output data read out of 800Hz
On-chip FIFO Integrated FIFO on sensor with 1 kb
On-chip interrupt features Auto-low power/Auto wakeup
Activity/In-activit
Step Counter (4µA)
Activity Recognition (Walking, Running, Standing still)
Orientation detection
Tap/double tap
Digital interface SPI (4-wire, 3-wire), I²C, 2 interrupt pins
VDDIO voltage range: 1.2V to 3.6V
RoHS compliant, halogen-free
Typical applications
Step Counting with ultra-low current consumption for extensive battery lifetime
Advanced system power management for mobile applications and (smart) watches
Fitness applications / Activity Tracking
Tap / double tap sensing
Drop detection for warranty logging
Window/door measurements for climate control and alarm systems
IoT applications powered by coin cell driven batteries, requiring <1uA and auto-wakeup
functionality
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Preliminary Data Sheet
BMA400
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Confidential
BST-BMA400-DS000-00 | Version 0.1 | November 2017 Bosch Sensortec
©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.
Table of contents
Contents
1. SPECIFICATION.............................................................................................................................8
2. ABSOLUTE MAXIMUM RATINGS ..............................................................................................10
3. QUICK START GUIDE .................................................................................................................11
Note about using the BMA400:................................................................................................. 11
First application setup examples algorithms: ............................................................................ 11
4. FUNCTIONAL DESCRIPTION .....................................................................................................17
4.1. SUPPLY VOLTAGE AND POWER MANAGEMENT ......................................................................18
4.2. POWER MODES –PERFORMANCE MODES .............................................................................19
Wake-up Interrupt / Auto wake-up............................................................................................. 22
Auto low-power mode............................................................................................................... 26
4.3. SENSOR DATA ....................................................................................................................28
Acceleration Data ..................................................................................................................... 28
Filter Configuration ................................................................................................................... 28
G-range selection ..................................................................................................................... 29
Data Ready Interrupt ................................................................................................................ 29
Temperature Sensor ................................................................................................................. 29
Sensor Time ............................................................................................................................. 30
4.4. FIFO..................................................................................................................................31
FIFO description ....................................................................................................................... 31
FIFO input data......................................................................................................................... 31
FIFO read out ........................................................................................................................... 32
FIFO overflow behavior ............................................................................................................ 32
Frames ..................................................................................................................................... 33
Under-read ............................................................................................................................... 36
Partial frame read ..................................................................................................................... 36
Over-read ................................................................................................................................. 36
Reading nearly-empty FIFO...................................................................................................... 36
FIFO flushing............................................................................................................................ 37
FIFO watermark interrupt.......................................................................................................... 37
FIFO full interrupt...................................................................................................................... 39
4.5. GENERAL INTERRUPT PIN CONFIGURATION ...........................................................................40
Interrupt Pin Mapping ............................................................................................................... 40
Interrupt latching....................................................................................................................... 40
Interrupt behavior during power mode switching....................................................................... 41
Electrical Interrupt Pin Behavior................................................................................................ 42
4.6. INTERRUPT FEATURES.........................................................................................................43
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BST-BMA400-DS000-00 | Version 0.1 | November 2017 Bosch Sensortec
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BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.
Note: Specifications within this document are subject to change without notice.
Interrupt pin mapping, interrupt status ...................................................................................... 43
Generic Interrupt 1 and 2.......................................................................................................... 44
Step Detector / Step Counter.................................................................................................... 47
Activity changed interrupt ......................................................................................................... 48
Tap Sensing Interrupt................................................................................................................ 49
Interrupt engine overrun ........................................................................................................... 50
Orientation change interrupt ..................................................................................................... 51
4.7. SENSOR SELF-TEST ............................................................................................................54
4.8. SOFT-RESET.......................................................................................................................55
5. REGISTER DESCRIPTION ..........................................................................................................56
5.1. REGISTER MAP ...................................................................................................................56
Register (0x00) CHIPID ............................................................................................................ 59
Register (0x02) ERR_REG....................................................................................................... 60
Register (0x03) STATUS........................................................................................................... 60
Register (0x04) ACC_X_LSB.................................................................................................... 61
Register (0x05) ACC_X_MSB................................................................................................... 62
Register (0x06) ACC_Y_LSB.................................................................................................... 62
Register (0x07) ACC_Y_MSB................................................................................................... 63
Register (0x08) ACC_Z_LSB .................................................................................................... 63
Register (0x09) ACC_Z_MSB................................................................................................... 64
Register (0x0A) SENSOR_TIME0 ............................................................................................ 64
Register (0x0B) SENSOR_TIME1 ............................................................................................ 65
Register (0x0C) SENSOR_TIME2 ............................................................................................ 65
Register (0x0D) EVENT............................................................................................................ 66
Register (0x0E) INT_STAT0 ..................................................................................................... 66
Register (0x0F) INT_STAT1...................................................................................................... 67
Register (0x10) INT_STAT2...................................................................................................... 68
Register (0x11) TEMP_DATA.................................................................................................... 68
Register (0x12) FIFO_LENGTH0.............................................................................................. 69
Register (0x13) FIFO_LENGTH1.............................................................................................. 69
Register (0x14) FIFO_DATA ..................................................................................................... 70
Register (0x15) STEP_CNT_0.................................................................................................. 70
Register (0x16) STEP_CNT_1.................................................................................................. 71
Register (0x17) STEP_CNT_2.................................................................................................. 71
Register (0x18) STEP_STAT .................................................................................................... 72
Register (0x19) ACC_CONFIG0 ............................................................................................... 72
Register (0x1A) ACC_CONFIG1............................................................................................... 73
Register (0x1B) ACC_CONFIG2............................................................................................... 74
Register (0x1F) INT_CONFIG0 ................................................................................................ 74
Register (0x20) INT_CONFIG1................................................................................................. 75
Register (0x21) INT1_MAP....................................................................................................... 75
Register (0x22) INT2_MAP....................................................................................................... 76
Register (0x23) INT12_MAP..................................................................................................... 77
Register (0x24) INT12_IO_CTRL ............................................................................................. 78
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BST-BMA400-DS000-00 | Version 0.1 | November 2017 Bosch Sensortec
©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.
Register (0x26) FIFO_CONFIG0 .............................................................................................. 79
Register (0x27) FIFO_CONFIG1 .............................................................................................. 80
Register (0x28) FIFO_CONFIG2 .............................................................................................. 80
Register (0x29) FIFO_PWR_CONFIG ...................................................................................... 81
Register (0x2A) AUTOLOWPOW_0.......................................................................................... 81
Register (0x2B) AUTOLOWPOW_1.......................................................................................... 82
Register (0x2C) AUTOWAKEUP_0........................................................................................... 83
Register (0x2D) AUTOWAKEUP_1........................................................................................... 83
Register (0x2F) WKUP_INT_CONFIG0.................................................................................... 84
Register (0x30) WKUP_INT_CONFIG1 .................................................................................... 85
Register (0x31) WKUP_INT_CONFIG2 .................................................................................... 85
Register (0x32) WKUP_INT_CONFIG3 .................................................................................... 86
Register (0x33) WKUP_INT_CONFIG4 .................................................................................... 86
Register (0x35) ORIENTCH_CONFIG0.................................................................................... 87
Register (0x36) ORIENTCH_CONFIG1.................................................................................... 88
Register (0x37) ORIENTCH_CONFIG2.................................................................................... 88
Register (0x38) ORIENTCH_CONFIG3.................................................................................... 89
Register (0x39) ORIENTCH_CONFIG4.................................................................................... 89
Register (0x3A) ORIENTCH_CONFIG5 ................................................................................... 90
Register (0x3B) ORIENTCH_CONFIG6 ................................................................................... 90
Register (0x3C) ORIENTCH_CONFIG7 ................................................................................... 91
Register (0x3D) ORIENTCH_CONFIG8 ................................................................................... 91
Register (0x3E) ORIENTCH_CONFIG9 ................................................................................... 92
Register (0x3F) GEN1INT_CONFIG0....................................................................................... 92
Register (0x40) GEN1INT_CONFIG1 ....................................................................................... 93
Register (0x41) GEN1INT_CONFIG2 ....................................................................................... 94
Register (0x42) GEN1INT_CONFIG3 ....................................................................................... 94
Register (0x43) GEN1INT_CONFIG31 ..................................................................................... 95
Register (0x44) GEN1INT_CONFIG4 ....................................................................................... 95
Register (0x45) GEN1INT_CONFIG5 ....................................................................................... 96
Register (0x46) GEN1INT_CONFIG6 ....................................................................................... 96
Register (0x47) GEN1INT_CONFIG7 ....................................................................................... 97
Register (0x48) GEN1INT_CONFIG8 ....................................................................................... 97
Register (0x49) GEN1INT_CONFIG9 ....................................................................................... 98
Register (0x4A) GEN2INT_CONFIG0....................................................................................... 98
Register (0x4B) GEN2INT_CONFIG1....................................................................................... 99
Register (0x4C) GEN2INT_CONFIG2 .................................................................................... 100
Register (0x4D) GEN2INT_CONFIG3 .................................................................................... 100
Register (0x4E) GEN2INT_CONFIG31................................................................................... 101
Register (0x4F) GEN2INT_CONFIG4..................................................................................... 101
Register (0x50) GEN2INT_CONFIG5 ..................................................................................... 102
Register (0x51) GEN2INT_CONFIG6 ..................................................................................... 102
Register (0x52) GEN2INT_CONFIG7 ..................................................................................... 103
Register (0x53) GEN2INT_CONFIG8 ..................................................................................... 103
Register (0x54) GEN2INT_CONFIG9 ..................................................................................... 104
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BST-BMA400-DS000-00 | Version 0.1 | November 2017 Bosch Sensortec
©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.
Register (0x55) ACTCH_CONFIG0 ........................................................................................ 104
Register (0x56) ACTCH_CONFIG1 ........................................................................................ 105
Register (0x57) TAP_CONFIG................................................................................................ 106
Register (0x58) TAP_CONFIG1.............................................................................................. 106
Register (0x59) STEP_COUNTER_CONFIG0........................................................................ 108
Register (0x5A) STEP_COUNTER_CONFIG1 ....................................................................... 108
Register (0x5B) STEP_COUNTER_CONFIG2 ....................................................................... 109
Register (0x5C) STEP_COUNTER_CONFIG3 ....................................................................... 109
Register (0x5D) STEP_COUNTER_CONFIG4 ....................................................................... 110
Register (0x5E) STEP_COUNTER_CONFIG5 ....................................................................... 110
Register (0x5F) STEP_COUNTER_CONFIG6 ........................................................................111
Register (0x60) STEP_COUNTER_CONFIG7.........................................................................111
Register (0x61) STEP_COUNTER_CONFIG8........................................................................ 112
Register (0x62) STEP_COUNTER_CONFIG9........................................................................ 112
Register (0x63) STEP_COUNTER_CONFIG10...................................................................... 113
Register (0x64) STEP_COUNTER_CONFIG11 ...................................................................... 113
Register (0x65) STEP_COUNTER_CONFIG12...................................................................... 114
Register (0x66) STEP_COUNTER_CONFIG13...................................................................... 114
Register (0x67) STEP_COUNTER_CONFIG14...................................................................... 115
Register (0x68) STEP_COUNTER_CONFIG15...................................................................... 115
Register (0x69) STEP_COUNTER_CONFIG16...................................................................... 116
Register (0x6A) STEP_COUNTER_CONFIG17 ..................................................................... 116
Register (0x6B) STEP_COUNTER_CONFIG18 ..................................................................... 117
Register (0x6C) STEP_COUNTER_CONFIG19 ..................................................................... 117
Register (0x6D) STEP_COUNTER_CONFIG20 ..................................................................... 118
Register (0x6E) STEP_COUNTER_CONFIG21 ..................................................................... 118
Register (0x6F) STEP_COUNTER_CONFIG22...................................................................... 119
Register (0x70) STEP_COUNTER_CONFIG23...................................................................... 119
Register (0x71) STEP_COUNTER_CONFIG24...................................................................... 120
Register (0x7C) IF_CONF ...................................................................................................... 120
Register (0x7D) SELF_TEST.................................................................................................. 121
Register (0x7E) CMD.............................................................................................................. 122
6. DIGITAL INTERFACES..............................................................................................................123
6.1. INTERFACE .......................................................................................................................123
6.2. INTERFACE I2C/SPI PROTOCOL SELECTION .......................................................................124
6.3. SPI INTERFACE AND PROTOCOL .........................................................................................124
6.4. PRIMARY I2C INTERFACE...................................................................................................129
I²C read access: ..................................................................................................................... 131
7. PIN-OUT AND CONNECTION DIAGRAMS ..............................................................................133
7.1. PIN-OUT ...........................................................................................................................133
7.2. CONNECTION DIAGRAMS ...................................................................................................134
SPI ......................................................................................................................................... 134
I2C.......................................................................................................................................... 135
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BST-BMA400-DS000-00 | Version 0.1 | November 2017 Bosch Sensortec
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BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.
Note: Specifications within this document are subject to change without notice.
8. PACKAGE...................................................................................................................................136
8.1. PACKAGE OUTLINE DIMENSIONS .........................................................................................136
8.2. SENSING AXIS ORIENTATION...............................................................................................137
8.3. LANDING PATTERN RECOMMENDATION................................................................................139
8.4. MARKING ..........................................................................................................................140
8.5. SOLDERING GUIDELINES ....................................................................................................141
8.6. HANDLING INSTRUCTIONS ..................................................................................................142
8.7. ENVIRONMENTAL SAFETY...................................................................................................143
Halogen content ..................................................................................................................... 143
Internal package structure ...................................................................................................... 143
9. LEGAL DISCLAIMER.................................................................................................................144
9.1. ENGINEERING SAMPLES.........................................................................................................144
9.2. PRODUCT USE ..........................................................................................................................144
9.3. APPLICATION EXAMPLES AND HINTS..................................................................................144
10. DOCUMENT HISTORY AND MODIFICATION..........................................................................145
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BST-BMA400-DS000-00 | Version 0.1 | November 2017 Bosch Sensortec
©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.
1. Specification
Unless stated otherwise, the given values are over lifetime, operating temperature and voltage ranges.
Minimum/maximum values are ±3.
Parameter Specification
Parameter
Symbol
Condition
Min
Typ
Max
Acceleration
Range
gFS2g
±2
g
gFS4g
±4
g
gFS8g
±8
g
gFS16g
±16
g
Supply Voltage
Internal
Domains
VDD
1.72
1.8
3.6
V
Supply Voltage
I/O Domain
VDDIO
1.2
1.8
3.6
V
Voltage Input
Low Level
VIL
SPI & I²C
0.3VDDIO
Voltage Input
High Level
VIH
SPI & I²C
0.7VDDIO
Voltage Output
Low Level
VOL
VDDIO=1.8V,
IOL=3mA, SPI
0.2VDDIO
VDDIO=1.2V,
IOL=3mA, SPI
0.23VDDIO
Voltage Output
High Level
VOH
VDDIO=1.8V,
IOH=3mA, SPI
0.8VDDIO
VDDIO=1.2V,
IOH=3mA, SPI
0.62VDDIO
Total Supply
Current in
Normal mode
IDD
Nominal VDD and
VDDIO, 25°C,
OSR=3
14
µA
Total Supply
Current in
Sleep Mode
IDDsum
Nominal VDD and
VDDIO, 25°C
200
nA
Total Supply
Current in
Low-power
Mode
IDDlp1
Nominal VDD and
VDDIO, 25°C
25 Hz ODR
OSR=0
800
nA
Wake-Up Time
tw_up
From sleep to
normal mode
2/ODR
Power-Up Time
ts_up
Starting the device
to sleep mode
1
ms
Operating
Temperature
TA
-40
+85
°C
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BST-BMA400-DS000-00 | Version 0.1 | November 2017 Bosch Sensortec
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BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.
Note: Specifications within this document are subject to change without notice.
OUTPUT SIGNAL
Parameter
Symbol
Condition
Min
Typ
Max
Units
Sensitivity
S2g
gFS2g, TA=25°C
1024
LSB/g
S4g
gFS4g, TA=25°C
512
LSB/g
S8g
gFS8g, TA=25°C
256
LSB/g
S16g
gFS16g, TA=25°C
128
LSB/g
Sensitivity
Temperature
Drift
TCS
0.02
%/K
Zero-g Offset
Off
Nominal VDD and
VDDIO, 25°C, gFS4g
Over life-time
80
mg
Zero-g Offset
Temperature
Drift
TCO
1
mg/K
Output Data
Rate
ODRNORM
Normal mode
12.5
800
Hz
Bandwidth
BWnorm
3dB cutoff
frequency of the
accelerometer is
selectable
0.24*ODR
0.48*ODR
Hz
Output Data
Rate
ODRLPM
Low-power mode
25
Hz
Nonlinearity
NL
Nominal VDD and
VDDIO, 25°C, gFS4g
0.5
%FS
Output Noise
Density
nrms
Typical VDD and
VDDIO, normal
mode, OSR=3 (high
performance) 25°C,
4g
220
µg/Hz
MECHANICAL CHARACTERISTICS
Parameter
Symbol
Condition
Min
Typ
Max
Units
Cross Axis
Sensitivity
S
relative contribution
between any two of
the three axes
2
%
Alignment Error
EA
relative to package
outline
0.5
°
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BST-BMA400-DS000-00 | Version 0.1 | November 2017 Bosch Sensortec
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BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.
Note: Specifications within this document are subject to change without notice.
2. Absolute maximum ratings
Absolute maximum ratings
Parameter
Condition
Min
Max
Units
Voltage at Supply Pin
VDD Pin
-0.3
3.6
V
VDDIO Pin
-0.3
3.6
V
Voltage at any Logic Pin
Non-Supply Pin
-0.3
VDDIO+0.3, <4
V
Passive Storage Temp. Range
≤ 65% rel. H.
-50
+150
°C
Mechanical Shock
Duration ≤ 200µs
10,000
g
Duration ≤ 1.0ms
2,000
g
Free fall
onto hard surfaces
1.8
m
ESD
HBM, at any Pin
2
kV
CDM
500
V
MM
200
V
Note:
Stress above these limits may cause damage to the device. Exceeding the specified electrical limits
may affect the device reliability or cause malfunction.
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