Data Sheet

ICM-20948
Document Number: DS-000189 Page 19 of 89
Revision: 1.3
4 APPLICATIONS INFORMATION
4.1 PIN OUT DIAGRAM AND SIGNAL DESCRIPTION
PIN NUMBER PIN NAME PIN DESCRIPTION
7
AUX_CL
I
2
C Master serial clock, for connecting to external sensors
8
VDDIO
Digital I/O supply voltage
9
AD0 / SDO
I
2
C Slave Address LSB (AD0); SPI serial data output (SDO)
10
REGOUT
Regulator filter capacitor connection
11
FSYNC
Frame synchronization digital input. Connect to GND if unused
12
INT1
Interrupt 1
13
VDD
Power supply voltage
18
GND
Power supply ground
19
RESV
Reserved. Do not connect.
20
RESV
Reserved. Connect to GND.
21
AUX_DA
I
2
C master serial data, for connecting to external sensors
22
nCS
Chip select (SPI mode only)
23
SCL / SCLK
I
2
C serial clock (SCL); SPI serial clock (SCLK)
24
SDA / SDI
I
2
C serial data (SDA); SPI serial data input (SDI)
1 – 6, 14 - 17 NC Do not connect
Table 10. Signal Descriptions
NOTE: Power up with SCL/SCLK and nCS pins held low is not a supported use case. In case this power up approach is used, software
reset is required using the PWR_MGMT_1 register, prior to initialization.
AUX_CL
VDDIO
SDO /
AD0
REGOUT
FSYNC
INT
1
GND
SCL /
SCLK
nCS
RESV
VDD
SDA / SDI
NC
AUX_DA
RESV
NC
NC
NC
NC
NC
NC
NC
NC
NC
ICM-20948
1
2
3
4
5
6
13
18
17
16
15
14
7 8
9
10
11
12
24 23
22
21
20 19
Figure 3. Pin out Diagram for ICM-20948 3 mm x 3 mm x 1 mm QFN