ICM-20602
10 USE NOTES
10.1 TEMPERATURE SENSOR DATA
Temperature sensor data goes into the FIFO whenever the FIFO is enabled and there is a sensor active unless the temperature is
explicitly disabled.
10.2 ACCELEROMETER-ONLY LOW-NOISE MODE
The first output sample in Accelerometer-Only Low-Noise Mode after wake up from sleep always has 1 ms delay, independent of
ODR.
10.3 ACCELEROMETER LOW-POWER MODE
Changing the value of SMPLRT_DIV register in Accelerometer Low-Power mode will take effect after up to one sample at the old
ODR.
10.4 SENSOR MODE CHANGE
When switching from low-power modes to low-noise modes, unsettled output samples may be observed at the gyroscope or
accelerometer outputs due to filter switching and settling. The number of unsettled output samples depends on the filter and ODR
settings. The number of unsettled output samples is minimized by selecting the widest low-noise-mode filter bandwidth consistent
with the chosen ODR.
10.5 TEMP SENSOR DURING GYROSCOPE STANDBY MODE
During transition from Gyro Low power mode (GYRO_CYCLE=1), to Gyro Standby mode, in addition to the Gyro axis (axes) being
turned off, the Temp Sensor will also be turned off if the Accel is disabled. In order to keep the temp sensor on during Gyroscope
standby mode when Accel is disabled, the following procedure should be followed:
Set GYRO_CYCLE = 0 at least one ODR cycle prior to entering Standby mode
At least one of the Gyro axis is ON prior to entering Standby mode
Set GYRO_STANDBY = 1
10.6 GYROSCOPE MODE CHANGE
Gyroscope will take one ODR clock period to switch from Low-Noise to Low-Power mode after GYRO_CYCLE bit is set.
If GYRO_CYCLE is set to 1 prior to turning on the gyroscope, the first sample will be from low-noise mode, which may not be a
settled value. It is therefore recommended to ignore the first reading in this case.
10.7 POWER MANAGEMENT 1 REGISTER SETTING
It is required to set CLKSEL[2:0] to 001 (auto-select) for full performance.
10.8 UNLISTED REGISTER LOCATIONS
Do not read unlisted register locations in Sleep mode as this may cause the device to hang up, requiring power cycle to restore
operation.
10.9 CLOCK TRANSITION WHEN GYROSCOPE IS TURNED OFF
When the gyroscope is on, the on-chip master clock source will be the gyroscope clock (assuming CLKSEL[2:0] = 001 for auto-select
mode); otherwise, the master clock source will be the internal oscillator as long as the part is not in Sleep mode. During a power
mode transition, whenever the gyroscope is disabled and the part enters a mode other than Sleep, the on-chip master clock source
will transition from the gyroscope clock to the internal oscillator. It will take about 20 µs for this transition to complete.
10.10SLEEP MODE
The paꢂt ꢊill oꢁlꢑ eꢁteꢂ “leep ꢌode ꢊheꢁ the “LEEP ꢎit iꢁ PW‘_MGMT_ꢈ is set to ꢖꢍꢋ. If “LEEP ꢎit is ꢖꢆꢋ aꢁd ꢎit “TBY_[X,Y,Z]A and
“TBY_[X,Y,)]G aꢂe all set to ꢖꢍꢋ, aꢃꢃeleꢂoꢌeteꢂ aꢁd gꢑꢂosꢃope ꢊill ꢎe tuꢂꢁed off, ꢎut the oꢁ-chip master clock will still be running and
consuming power.
10.11NO SPECIAL OPERATION NEEDED FOR FIFO READ IN LOW POWER MODE
The use of FIFO is enabled in all modes including low power mode.
Document Number: DS-000176
Revision: 1.0
Page 50 of 57
Revision Date: 10/03/2016
TDK [ TDK ELECTRONICS ]
