BMA255 datasheet(63/119 Pages) BOSCH

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BMA255

Data sheet

Page 63

BST-BMA255-DS004-05 | Revision 1.2 | August 2014

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.

Selection of the main power modes and the low power sleep period.

Name

0x11

PMU_LPW

Bit

Read/Write

R/W

Reset

Value

Content

suspend

lowpower_en

deep_suspend

sleep_dur<3>

Bit

Read/Write

R/W

Reset

Value

Content

sleep_dur<2:0>

reserved

suspend, low_power_en, deep_suspend:

Main power mode configuration setting {suspend; lowpower_en;

deep_suspend}:

{0; 0; 0} 

NORMAL mode;

{0; 0; 1} 

DEEP_SUSPEND mode;

{0; 1; 0} 

LOW_POWER mode;

{1; 0; 0} 

SUSPEND mode;

{all other} 

illegal

Please note that only certain power mode transitions are permitted.

sleep_dur<3:0>:

Configures the sleep phase duration in LOW_POWER mode:

´0000b´ to ´0101b´



0.5 ms,

´0110b´  1 ms,

´0111b´



2 ms,

´1000b´  4 ms,

´1001b´



6 ms,

´1010b´  10 ms,

´1011b´



25 ms,

´1100b´  50 ms,

´1101b´



100 ms,

´1110b´  500 ms,

´1111b´



1 s

Please note, that all application specific settings which are not equal to the default settings

(refer to 6.2 register map), must be re-set to its designated values after DEEP_SUSPEND.

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