User Manual

MPU-6000/MPU-6050 Register Map and
Descriptions
Document Number: RM-MPU-6000A-00
Revision: 4.2
Release Date: 08/19/2013
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4.29 Register 108 – Power Management 2
PWR_MGMT_2
Type: Read/Write
Register
(Hex)
Register
(Decimal)
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
6C
108
LP_WAKE_CTRL[1:0]
STBY_XA
STBY_YA
STBY_ZA
STBY_XG
STBY_YG
STBY_ZG
Description:
This register allows the user to configure the frequency of wake-ups in Accelerometer Only Low
Power Mode. This register also allows the user to put individual axes of the accelerometer and
gyroscope into standby mode.
The MPU-60X0 can be put into Accelerometer Only Low Power Mode using the following steps:
(i) Set CYCLE bit to 1
(ii) Set SLEEP bit to 0
(iii) Set TEMP_DIS bit to 1
(iv) Set STBY_XG, STBY_YG, STBY_ZG bits to 1
All of the above bits can be found in Power Management 1 register (Register 107).
In this mode, the device will power off all devices except for the primary I
2
C interface, waking only
the accelerometer at fixed intervals to take a single measurement. The frequency of wake-ups can
be configured with LP_WAKE_CTRL as shown below.
LP_WAKE_CTRL
Wake-up Frequency
0
1.25 Hz
1
5 Hz
2
20 Hz
3
40 Hz
For further information regarding the MPU-6050’s power modes, please refer to Register 107.
The user can put individual accelerometer and gyroscopes axes into standby mode by using this
register. If the device is using a gyroscope axis as the clock source and this axis is put into standby
mode, the clock source will automatically be changed to the internal 8MHz oscillator.
Parameters:
LP_WAKE_CTRL 2-bit unsigned value.
Specifies the frequency of wake-ups during Accelerometer Only Low Power
Mode.
STBY_XA When set to 1, this bit puts the X axis accelerometer into standby mode.
STBY_YA When set to 1, this bit puts the Y axis accelerometer into standby mode.
STBY_ZA When set to 1, this bit puts the Z axis accelerometer into standby mode.
STBY_XG When set to 1, this bit puts the X axis gyroscope into standby mode.
STBY_YG When set to 1, this bit puts the Y axis gyroscope into standby mode.
STBY_ZG When set to 1, this bit puts the Z axis gyroscope into standby mode.