ICM-20690
10 USE NOTES
10.1 VALID COMBINATIONS OF UI AND OIS DATAPATH SETTINGS
When the device is being used with UI and OIS datapaths active, certain combinations of settings are valid and others are invalid.
These are summarized in the tables below. The device is in low-noise mode for these configurations.
Gyroscope Configurations:
UI Mode
FCHOICE_B =
00; DLPFCFG =
1 to 6
FCHOICE_B =
00; DLPFCFG = 7 00; DLPFCFG = 0
FCHOICE_B =
Filter Settings
FCHOICE_B = 01
FCHOICE_B = 10
ODR
32kHz
32kHz
Valid
32kHz
Valid
8kHz
Valid
8kHz
Valid
≤1kHz
Valid
FCHOICE_OIS_B = 11
FCHOICE_OIS_B =
10; FCHOICE_B = 10
FCHOICE_OIS_B =
10; FCHOICE_B = 00
FCHOICE_OIS_B =
01; FCHOICE_B = 00
FCHOICE_OIS_B =
01; FCHOICE_B = 00;
DLPF_CFG = 1 to 6
32kHz
8kHz
8kHz
Invalid
Invalid
Invalid
Valid
Invalid
Invalid
Invalid
Valid
Invalid
Valid
Invalid
Valid
OIS Mode
Valid
Valid
Valid
≤1kHz
Invalid
Invalid
Invalid
Invalid
Valid
Accelerometer Configurations:
UI Mode
ACCEL_FCHOICE_B =
0; A_DLPF_CFG = 0 to
ACCEL_FCHOICE_B =
0; A_DLPF_CFG = 7
Filter Settings
ACCEL_FCHOICE_B = 1
6
ODR
4kHz
4kHz
Valid
≤1kHz
Valid
≤1kHz
Valid
OIS Mode
ACCEL_FCHOICE_OIS_B = 11
ACCEL_FCHOICE_OIS_B = 10;
ACCEL_FCHOICE_B = 0
≤1kHz
Invalid
Valid
Valid
ACCEL_FCHOICE_OIS_B = 01;
ACCEL_FCHOICE_B = 0;
≤1kHz
Invalid
Invalid
Valid
A_DLPF_CFG = 0 to 6
10.2 FIFO WATERMARK THRESHOLD
FIFO watermark threshold, FIFO_WM_TH, is limited to 8 bits but the FIFO size is 1Kbytes. This limits the use of FIFO watermark to
256 out of a possible 1024 bytes.
10.3 FIFO WATERMARK INTERRUPT
For FIFO watermark interrupt, FIFO_WM_INT, to receive future interrupts after a first interrupt, the host must clear the status
register with a read.
10.4 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.
Page 37 of 76
Document Number: DS-000178
Revision: 1.0
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