BMA150 datasheet(8/55 Pages) ETC2

8 / 55 page

Data sheet

BMA150

Triaxial, digital acceleration sensor

Bosch Sensortec

Rev. 1.5

Page 8

30 May 2008

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.

3. Global memory map

The global memory map of BMA150 has three levels of access:

Memory Region

Content

Access Level

Operational

Registers

Data registers, control registers,

status registers, interrupt settings

Direct access via serial interface

Default Setting

Registers

Default values for operational

registers, acceleration and

temperature trimming values

Access blocked by default;

Access enabled by setting control

bit in operational registers via

serial interface

Bosch Sensortec

Reserved Registers

Internal trimming registers

Protected

The memory of BMA150 is realized in diverse physical architectures. Basically BMA150 uses

volatile memory registers to operate. The volatile part of the memory can be changed and read

quickly. Part of the volatile memory (“image”) is a copy of the non-volatile memory (EEPROM).

The EEPROM can be used to set default values for the operation of the sensor IC. The

EEPROM is write only. The register values are copied to the image registers after power on or

soft reset. The download of all EEPROM bytes to image registers is also done when the content

of one EEPROM byte has been changed by a write command.

All operational and default setting registers are accessible through serial interface with a

standard protocol:

Type of

Function of Register

Command

Volatile / non-volatile

Data

Registers

− Chip identification, chip version

− Acceleration data, temperature

Read

non-volatile (hard coded)

volatile

Control

Registers

− Activating self test, soft reset,

switch to sleep mode etc.

Read / Write

volatile

Status

Registers

− Interrupt status and self test

status

− Customer usable status bytes

Read

Read / Write

Volatile

volatile

Setting

− Functional settings (range,

bandwidth)

− Interrupt settings

Read / Write

volatile

EEPROM

− Default settings of functional

and interrupt settings

− Trimming values

− Customer reserved data

storage

− Bosch Sensortec Reserved

Memory

Write

non-volatile

BMA150 Datasheet(PDF) 8 Page - List of Unclassifed Manufacturers

BMA150 Datasheet(HTML) 8 Page - List of Unclassifed Manufacturers

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55

Datasheet Download

Link URL