Data Sheet

ICM-20948
Document Number: DS-000189 Page 65 of 89
Revision: 1.3
10.16 ACCEL_CONFIG_2
Name: ACCEL_CONFIG_2
Address: 21 (15h)
Type: USR2
Bank: 2
Serial IF: R/W
Reset Value: 0x00
BIT
NAME
FUNCTION
7:5
-
Reserved.
4
AX_ST_EN_REG
X Accel self-test enable.
3
AY_ST_EN_REG
Y Accel self-test enable.
2
AZ_ST_EN_REG
Z Accel self-test enable.
1:0
DEC3_CFG[1:0]
Controls the number of samples averaged in the accelerometer decimator:
0: Average 1 or 4 samples depending on ACCEL_FCHOICE (see Table 19).
1: Average 8 samples.
2: Average 16 samples.
3: Average 32 samples.
Table 19 lists the accelerometer filter bandwidths available in the low-power mode of operation. In the low-power
mode of operation, the accelerometer is duty-cycled.
AVERAGES 1X 4X 8X 16X 32X
ACCEL_FCHOICE 0 1 1 1 1
ACCEL_DLPFCFG
x 7 7 7 7
DEC3_CFG
0 0 1 2 3
TON (MS)
0.821 1.488 2.377 4.154 7.71
NBW (HZ)
1237.5 496.8 264.8 136.5 69.2
RMS NOISE
[MG-RMS] TYP
(BASED ON
ACCELEROMETER NOISE:
190µG/√HZ)
6.7 4.2 3.1 2.2 1.6
ACCEL_SMPLRT_DIV ODR [HZ] CURRENT CONSUMPTION [µA] TYP
4095 0.27
6.2
6.3
6.5
6.9
7.6
2044 0.55
6.3
6.6
7.0
7.7
9.2
1022 1.1
6.7
7.2
8.0
9.4
12.3
513 2.2
7.3
8.4
9.9
12.8
18.6
255 4.4
8.7
10.9
13.8
19.7
31.4
127 8.8
11.4
15.8
21.6
33.3
56.7
63 17.6
16.8
25.6
37.3
60.7
107.5
31 35.2
27.6
45.2
68.6
115.3
208.9
22 48.9
36.1
60.5
93.0
158.1
288.3
15 70.3
49.2
84.3
131.1
224.7
411.9
10
102.3
68.9
119.9
188.0
324.1
596.3
7
140.6
92.4
162.7
256.3
443.3
N/A