ST X-NUCLEO-IKS02A1 User manual

Introduction
The X-NUCLEO-IKS02A1 industrial motion MEMS sensor expansion board is compatible with the Arduino UNO R3 connector
layout.
It embeds the ISM330DHCX 3-axis accelerometer and 3-axis gyroscope, the IIS2MDC 3-axis magnetometer, the IIS2DLPC 3-
axis accelerometer, the IMP34DT05 digital microphone.
The X-NUCLEO-IKS02A1 interfaces with the STM32 microcontroller via I²C pin, with the possibility of changing the default I²C
port.
Figure 1. X-NUCLEO-IKS02A1 expansion board
Getting started with the X-NUCLEO-IKS02A1 industrial motion MEMS sensor
expansion board for STM32 Nucleo
UM2633
User manual
UM2633 - Rev 1 - November 2019
For further information contact your local STMicroelectronics sales office.
www.st.com

1Getting started
1.1 Hardware requirements
The X-NUCLEO-IKS02A1 expansion board has been designed to be used with any STM32 Nucleo development
board equipped with an Arduino UNO R3 connector.
The expansion board must be plugged on the matching pins of the development board connector.
Figure 2. X-NUCLEO-IKS02A1 plugged on an STM32 Nucleo board
Note: X-NUCLEO-IKS02A1 components are ESD sensitive: since the board has male/female pass through
connectors, it is important to handle it with care to avoid bending or damaging the pins.
1.2 System requirements
To complete the system setup, you need:
•Windows (version 7 or above) PC
• a USB type A to mini-B USB cable to connect the STM32 Nucleo to the PC
• board firmware and software package (X-CUBE-MEMS1) installed on the user PC
The X-CUBE-MEMS1 firmware and related documentation is available on www.st.com.
UM2633
Getting started
UM2633 - Rev 1 page 2/14

2Hardware description
The X-NUCLEO-IKS02A1 allows functionality testing of the motion MEMS accelerometer, gyroscope,
magnetometer and environmental sensors for humidity, temperature and pressure through I²C communication
bus.
It also allows all the ISM330DHCX sensor hub function testing.
The board features:
•ISM330DHCX MEMS 3D accelerometer (±2/±4/±8/±16 g) plus 3D gyroscope (±125/±250/±500/±1000/±2000
dps)
•IIS2MDC MEMS 3D magnetometer (±50 gauss)
•IIS2DLPC MEMS 3D accelerometer low power (±2/±4/±8/±16 g)
•IMP34DT05 MEMS digital omnidirectional microphone (-26 dBFS, ±3 dB sensitivity)
• DIL 24-pin socket available for additional MEMS adapters and other sensors
• Free comprehensive development firmware library and samples for all sensors compatible with STM32Cube
firmware
• Available I²C sensor hub features on ISM330DHCX
• Compatible with STM32 Nucleo boards
• Equipped with Arduino UNO R3 connector
• RoHS and WEEE compliant
Each device has a separate power supply to allow power consumption measurement of every single sensor.
All MEMS sensors use a 1.8 V domain.
The expansion board is power supply compatible with STM32 Nucleo boards. It contains LDOs to generate 1.8 V.
The signals between the sensors and the main board are translated by a level shifter.
RELATED LINKS
2.2 I²C bus connection modes on page 4
2.1 Default solder bridge configuration
The X-NUCLEO-IKS02A1 solder bridges can be opened (not mounted) or closed (mounted) to have the different
hardware configurations.
Table 1. Solder bridge default configuration (device to I²C bus connection)
Device BUS name Solder bridge (default) Solder bridge (not mounted)
IIS2DLPC I²C2 SB3, SB13
ISM330DHCX I²C2 SB7, SB11
IIS2DMC I²C1 SB33, SB34
STM32 Nucleo I²C2 SB35, SB36
DIL 24 adapter I²C1 SB12, SB19 SB1, SB4, SB6, SB10, SB14, SB16, SB18, SB20, SB21, SB22
DIL 24 adapter I²C2 SB16, SB21 SB1, SB4, SB6, SB10, SB14, SB12, SB18, SB20, SB19, SB22
DIL 24 adapter I²Cx SB14, SB20 SB1, SB4, SB6, SB10, SB12, SB16, SB18, SB19, SB21, SB22
UM2633
Hardware description
UM2633 - Rev 1 page 3/14

Table 2. Device I²C address
Device Solder bridge (non default) I²C address default
IIS2DLPC SB8 32h
IIS2DLPC SB9(1) 30h
ISM330DHCX SB15 D6h
ISM330DHCX SB17(1) D4h
IIS2DMC -- 3Ch
1. Not mounted by default.
Other default solder bridges are: SB40 to SB48 (STM32 Nucleo GPIO INT), SB23, SB25, SB39, SB32.
Other not mounted by default solder bridges are: SB37, SB50, SB51, SB52, SB53, SB54.
2.2 I²C bus connection modes
The ISM330DHCX I²C sensor hub can be used as I²C master of other devices (slaves) connected to an I²Caux
bus.
The sensors on the X-NUCLEO-IKS02A1 expansion board can thus be connected in five different I²C bus modes
(with or without the ISM330DHCX sensor hub).
Mode 1: standard I²C bus connection (all sensors)
In standard I²C mode, all devices are connected to an external main board via the same I²C bus.
The board configuration is:
• JP7: 1-2 3-4 (I²C1 = I²C2, I²Cx=GND)
• JP8: 1-2 3-4 (I²C1 = I²C2, I²Cx=GND)
Figure 3. X-NUCLEO-IKS02A1 standard I²C
STM32 Nucleo board
Arduino UNO R3
ST morpho
I²C2
ISM330DHCX
IIS2DMC
IIS2DLPC
DIL 24
Mode 2: ISM330DHCX I²C sensor hub (all sensors)
In sensor hub I²C mode, the ISM330DHCX is connected to an external main board by an I²C bus; all other
devices are slaves connected to ISM330DHCX via I²Caux, except IIS2DLPC.
The board configuration is:
•JP7: 2-3 (I²C1 = I²Cx)
UM2633
I²C bus connection modes
UM2633 - Rev 1 page 4/14

• JP8: 2-3 (I²C1 = I²Cx)
Figure 4. X-NUCLEO-IKS02A1 ISM330DHCX I²C sensor hub
STM32 Nucleo board
Arduino UNO R3
ST morpho
I²C2 ISM330DHCX
IIS2DMC
IIS2DLPC
DIL 24
I²C1
I²C2aux
(sensor hub)
Mode 3: DIL 24 plus ISM330DHCX I²C sensor hub (all sensors, not DIL 24)
In sensor hub I²C mode, the ISM330DHCX and the DIL 24 adapter are connected to an external main board by
an I²C bus; all other devices are slaves of the ISM330DHCX via I²Caux.
The board configuration is:
•JP7: 2-3 (I²C1 = I²Cx)
• JP8: 2-3 (I²C1 = I²Cx)
• DIL24 adapter (to I²C2): SB16, SB21
• Not mounted: SB6, SB10, SB12, SB14, SB18, SB19, SB20, SB22
Figure 5. X-NUCLEO-IKS02A1 DIL 24, ISM330DHCX I²C sensor hub (all sensors)
STM32 Nucleo board
Arduino UNO R3
ST morpho
I²C2 ISM330DHCX
IIS2DMC
DIL 24 I²C1
I²C2aux
(sensor hub)
IIS2DLPC
Mode 4: ISM330DHCX plus DIL 24 I²C sensor hub (all sensors)
In sensor hub I²C mode, the ISM330DHCX and the DIL 24 adapter are connected to an external main board by
an I²C bus; all other devices are slaves of the DIL 24 adapter via I²Caux, except IIS2DLPC.
The board configuration is:
•JP7: 2-3 (I²C1 = I²Cx)
• JP8: 2-3 (I²C1 = I²Cx)
• DIL24 adapter (to I²C2): SB12, SB19
• Not mounted: SB6, SB10, SB14, SB16, SB18, SB20, SB21, SB22
UM2633
I²C bus connection modes
UM2633 - Rev 1 page 5/14

Figure 6. X-NUCLEO-IKS02A1 ISM330DHCX, DIL 24, I²C sensor hub (all sensors)
STM32 Nucleo board
Arduino UNO R3
ST morpho
I²C2 ISM330DHCX
IIS2DMC
DIL 24 I²C1
I²C2aux
(sensor hub)
IIS2DLPC
Mode 5: ISM330DHCX plus I²C sensor hub DIL24
In sensor hub I²C mode, the ISM330DHCX and other sensors are connected to an external main board via an I²C
bus; the DIL 24 adapter is a slave of the ISM330DHCX via I²Caux.
The board configuration is:
•JP7: 1-2 (I²C1 = I²Cx)
• JP8: 1-2 (I²C1 = I²Cx)
• DIL24 adapter (to I²Cx): SB14, SB20
• Not mounted: SB6, SB10, SB12, SB16, SB18, SB19, SB21, SB22
Figure 7. X-NUCLEO-IKS02A1 ISM330DHCX plus sensor hub DIL 24
STM32 Nucleo board
Arduino UNO R3
ST morpho
I²C2 ISM330DHCX
IIS2DMC
DIL 24
I²C1
I²C2aux
(sensor hub)
IIS2DLPC
2.3 Sensor I²C address selection
Most of the sensors allow selecting LSB of the I²C address by pulling SD0 pin low or high.
The X-NUCLEO-IKS02A1 expansion board contains solder bridges to control SD0 level.
Table 3. Solder bridges for SD0 level control and I²C address
Sensor SD0 High SD0 Low
IIS2DLPC(U1) SB8 ADD=32h SB9 ADD=30h
ISM330DHCX (U2) SB15 ADD=D6h SB17 ADD=D4h
IIS2DMC (U3) ADD =3Ch ADD =3Ch
DIL24 Adapter (J1) SB1/SB2 SB4/SB5
UM2633
Sensor I²C address selection
UM2633 - Rev 1 page 6/14

2.4 Sensor current consumption measurement
The X-NUCLEO-IKS02A1 expansion board is equipped with jumpers which allow separate current consumption
measurement of each sensor.
To measure current consumption, connect an ammeter to the appropriate jumper.
As the sensors have very low current consumption, you should set a suitable range and use an ammeter with low
burden voltage.
Table 4. Jumpers for current consumption measurement
Sensor Jumper
IIS2DMC (U3) JP12
ISM330DHCX (U2) JP3
IMP34DT05 (U4) JP11
IIS2DLPC (U1) JP1
DIL24 Adapter (J1) JP5
2.5 Sensor disconnection
To disconnect a sensor, you should disconnect the I²C bus as well as the power supply.
Table 5. Link between sensors, jumpers and I²C solder bridges
Sensor Power SDA SCL
IIS2DMC (U3) JP12 SB34 SB33
ISM330DHCX (U2) JP3 SB11 SB7
IIS2DLPC (U1) JP1 SB3 SB13
IMP34DT05 (U4) JP11 SB26 SB27
DIL24 adapter JP5 SB12,14,16 SB19,20,21
2.6 Adapter board for DIL 24 socket
An additional sensor can be connected as an adapter board to J1 DIL 24 socket.
Please visit www.st.com to find other available sensors.
As there are a few different interrupt signal assignments for DIL 24 pins, the appropriate pin can be selected using
the JP6 header.
Figure 8. JP6 header
10
4
65
8
12
7
1
9
JP6
3
Header 6x2
2
11
USER_INT routing selector
USER_INT M_INT_Pin16
M_INT_Pin17
M_INT2_O
M_SA0/DRDY
M_INT_Pin24
M_SA0/DEN
UM2633
Sensor current consumption measurement
UM2633 - Rev 1 page 7/14

2.7 Connectors
Table 6. X-NUCLEO-IKS02A1 connectors
Connector Pin(1) Signal
CN5
7 GND
9 I²C SDA
10 I²C SCL
2 IIS2DLPS_INT2
4 MIC_DAT
6 MIC_CLK
CN6
2 Vio
4 3.3 V
6 GND
7 GND
CN8
3 IIS2DMC DRDY / IIS2DLPC INT
4 IIS2DMC DRDY / IIS2DLPC INT
5 IIS2DLPC INT2
6 INT1 (DIL24)
CN9
3 USER INT
4 MIC_CLK
5 MIC_DATA
6 ISM330DHCX INT2
7 ISM330DHCX INT1
1. The non-listed pins are not connected.
UM2633
Connectors
UM2633 - Rev 1 page 8/14

Table 7. ST morpho connectors
Connector Pin(1) Signal
CN7
12 3.3 V
16 3.3 V
20 GND
22 GND
32 IIS2DMC DRDY/ IIS2DLPC_INT
34 IIS2DMC DRDY/ IIS2DLPC_INT
35 MIC_CLK
36 IIS2DLPC_INT2
38 INT1 (DIL24)
CN10
3 I²C SCL
5 I²C SDA
9 GND
11 MIC_CLK
15 MIC_DATA
19 IIS2DLPC_INT2
25 ISM330DHCX INT1
26 MIC_DATA
27 ISM330DHCX INT2
28 MIC_DATA
29 MIC_DATA
30 MIC_CLK
31 MIC_CLK
33 USER INT
1. The non-listed pins are not connected.
UM2633
Connectors
UM2633 - Rev 1 page 9/14

3Schematic diagram
Figure 9. X-NUCLEO-IKS02A1 circuit schematic
EN
3
I/O_Vcc4
5
ISM330DHC_INT1
SCx
GND
1V8
100nF
C4
1 2 3
GND
3V3
1V8
GND
10
SDOx
LDK130M-R
U2
6
I/O_VL5
SCL
SB27
10
CN5
Mag
U3
SB51
DNM
SB17
DNM
I2C ADDw = D4h
JP8
100nF
C16
1
2
3
4
JP7
M_INT_Pin16
M_INT2
CN8
4
I/O_VL3
C14 100nF
1V8 = 1.8V
MIC_DAT_O
GND 6
GND
SB52
M
SDA/SDI/SDO
4
SB46
DNM SPI_MISO
4k7
R17
14
GND
3
2
JP2
I2C2 Vio header
1 2
I/O_VL2 18
GND
GND
II2DMC_DRDY
SB40
I/O_Vcc1
19
ST2378E
U7
SCL
SDA
DNM
SB7
1V8
Vio
Trigger from DRDY MAG in SensorHub Mode
1-2 , 3-4
I/O_Vcc6
7
GND
INT2
11
INT1
12
INT2
OCS
GND
I/O_VL2 18
M_SA0/DRDY
M_INT_Pin24
1V8
ISM330DHC_INT2
ISM330DHC_INT2_O
ISM330DHC_INT1_O
II2DMC_DRDY
IIS2DLPC_INT_O
GND
16
1V8
16
I/O_VL4
SB16
DNM
10µF
C6
4
10
GND
U5
INT1
SB30 SB28
VDD_IO 10
SB38
Arduino connector
4k7
R11
11
SCL/SPC 1
SDA
MIC_DAT
100nF
C80
SPI_MOSI
SB25
17
18
4k7
R1
10µF
C3
14
I/O_VL6
IIS2DLPC_INT2
1V8
CS 2
SDx
3SCx
I/O_Vcc3
17
GND
5GND
JP7, JP8 must have the shunts in the same position
I/O_Vcc3
17
I/O_VL8 12 I/O_Vcc7
13
1V8 I2C2_SDA
I2C2_SCL
SB12
SB43 DNM
I/O_Vcc7
I2C2_SCL
1V8
2
I/O_VL1
Vio
C31
GND 8
1V8 GND 101V8
MIC_DAT_O
Vio
I2C BUS ROUTING
1V8
21
L/R 2
I/O_Vcc4
5
II2SMDC magnetometer
VDDIO 5
SB29
DNM
SB33
M_INT_Pin17
SPI_MISO
C12 100nF
II2DMC_DRDY_O
13
DIL24 Socket
3V3J1
2k2
R8
SB42
GND
Header 19x2
CN7
1
2
3
IIS2DLPC_INT2_O
1V8
Acc_ULP
U1
VL 1
SB4
DNM
4
I/O_VL3
2
I/O_VL1
Vio
1 2
JP4
SDx
I/O_Vcc6
7
Arduino connector
SB36
SB18
1V8
GND
SPI_MOSI_O
SPI_CK_O
NC
2
CN9
I/O_Vcc5
15
M_SA0/DEN
IIS2DLPC_INT
ISM330DHC_INT2
1V8
I2C1_SDA
100nF
C5
9
8
7
6
5
4
3
2
1
Vio
OE
11
JP9
ISM330DHC_INT1_O 13
morpho connector
I2C ADDw = D6hSB15
Vout 5
GND
14
I/O_VL6
VDD
9
Header 19x2
CN10
220nF
C32
NC 11
SB26
1 2
JP12
20 Vcc
SB9
I2C ADDw = 30h
DNM
11
10
SB24
DNM
JP11
C11 100nF
MIC_CK
22
M_SA0/DEN
23
SPI_CS_O
SPI_MOSI
SPI_CK
SB2
1 2
JP1
4
5
NC 12
IIS2DLPC_INT2
1V8
USER_INT routing selector
SDO/SA0 3
IIS2DLPC
ISM330DHCX accelerometer and gyroscope
4k7
R2
I/O_Vcc8
9
SB47
1V8SPI_MOSI_O
SPI_CK_O
SPI_MISO_O
SPI_CS_O
4k7
R12
I2C ADDw = 3Ch
SB3
Arduino and morpho connectors
OE
11
SB14
DNM
BT_Irq
I/O_Vcc2
3
GND
12k
R6
8
7
6
5
4
3
2
1
GND
INT/DRDY 7
C30
I2C1_SCL
I/O_Vcc8
9
1V8
15k
R7
J2
SDA
SCL
DNM
SB34
I2C1_SDA DNM
I2C1_SCL
GND
20
JP3
MIC_CK
MIC_DAT
MIC_CK_O
MIC_DAT_O
MIC_CK_O
MIC_DAT_O
MIC_CK_O
Adj 4Data
4
8
DN MIC_DAT_O
12
JP6
Header 6X2
5
NC
SB31
DNM
I2C ADDw = 32h
SB8
GND
GND
M_INT2_O
M_INT1_O USER_INT_O
USER_INT
SCL
13
DNM
GND
4k7
R10
7RES
SB13
20 Vcc
SB6
100nF
C17
GND
Arduino connector
SB41
SCx
SCx
SDx
Vdd_IO
10
1
CS
3
4k7
R9
SPI_CS
II2DMC_DRDY_O IIS2DLPC_INT_O
II2DMC_DRDY_O
M_INT1
SB49
1V8
R4
4k7
DNM4k7
DNM
SB22
SB23
DNM
SDx
JP5
SB21
DNM
M_INT_Pin17
I/O_Vcc2
3
1V8
1 2 3
IMP34DT05 microphone
11
CS
12
SB37
DNM
IIS2MDC
VL 1
GND
1 2 3
1
2
3
4
5
6
2.2µF
C18
24
CLK
3
SB32
5C1
II2DMC_DRDY
SPI_CK
SPI_MISO_O
15
SB35
SB44
IIS2DLPC_INT2_O
1
2
3
4
5
6
7
8
SDA/SDI/SDO 4
SDA
14
DIL24 Socket for Adapter Board
6
GND 10
SB1
DNM
1Vin
GND
I2C2_SDA
I2C2_SDA
I2C2_SCL
I2C2_SCL
SDA
SCL
I2C1_SCL
I2C1_SDA
I2C2_SCL
I2C2_SDA
SDx
SCx
SCx
SDx
I²C Mode
standard
ISM330DHC
Sensor HUB
Shunts
SB20
DNM
I/O_Vcc5
15
I/O_Vcc1
ST2378E
ISM330DHC_INT2_O 19
U6
I2C1_SCL
I2C1_SDA
I2C2_SDA
I2C2_SCL
I/O_VL5 6
GND
8
I/O_VL7
6
SB54
DNM
MIC_CK_O
MIC_CK_O
M_INT2
M_INT1
M_INT2_O
M_INT1_O
USER_INT_O
2-3
I2C1=I2C2 all devices are on same bus (I2Caux = GND)
ISM330DHC (U2) as master of I2C1 = I2Cx
U3,U4,U8,,U9, Adapter are slave of U2
ISM330DHC_INT1
1
2
3
4
Vio
C13 100nF
CN6
I2C2_SDA
19
2
GND 7
1 2
VDD 9
SB39
SPI_CS
1V8
JP10
1
2
3
4
5
6
7
8
9
12
DNM
SB19
SB45
10µF
C15
6
GND
SB53
DNM
M_INT_Pin24
M_SA0/DRDY
GND
8
U4
8
I/O_VL7
9
GND
GND
SB5
8
GND
SB10
DNM
Vdd 1
Vio
1SCL
I/O_VL4 16
Vio
7
SB50
DNM
SDO
2
IIS2DLPC_INT2_O
Vdd
9
IIS2DLPC_INT
1
SB11
GND
I/O_VL8 12
2k2
R3
Description
IIS2DLPC accelerometer
10µF
100nF
Arduino connector
DNM
M_INT_Pin16
R5
IIS2DLPC_INT_O
USER_INT
UM2633 - Rev 1 page 10/14
UM2633
Schematic diagram