Features

• The following ST MEMS sensors are mounted:– LSM6DSL 6-axis inertial module– LIS2MDL Magnetic sensor– LPS22HB Pressure sensor– HTS221 Humidity and Temperature sensor– MP34DT05-AMicrophone

• VL53L0X gesture detector• Based on STM32F412C microcontroller

DescriptionThe STEVAL-MKI187V1 is a mezzanine board (also referred to as 96BoardsArgonkey) designed according to the Linaro specification. The board acts as asensor hub platform for all 96Boards compliant products. The board can be used asa standalone board or connected to the HiKey (LeMaker) board from 96Boards. Theboard has two buttons (Reset and user) and several LEDs that are appropriatelypositioned for IoT hardware applications.

Product summary

ArgonKey mezzanine board based ondifferent ST sensors STEVAL-MKI87V1

iNEMO inertial module, 3-axisaccelerometer, 3-axis gyroscope, always-on, smart FIFO buffer, free-fall, wakeup,6D/4D orientation, I2C, SPI LSM6DSL

Magnetic sensor, digital output, 50 gaussmagnetic field dynamic range, ultra-lowpower high performance 3-axismagnetometer LIS2MDL

Magnetic sensor, digital output, 50 gaussmagnetic field dynamic range, ultra-lowpower high performance 3-axismagnetometer LPS22HB

Capacitive digital sensor for relativehumidity and temperature HTS221

MEMS audio sensor omnidirectionaldigital microphone, 64 dB SNR, -26 dBFSsensitivity, top-port, 122.5 dBSPL AOPMP34DT05-A

World smallest Time-of-Flight (ToF)ranging sensor VL53L0X

ArgonKey mezzanine board based on different ST sensors

STEVAL-MKI187V1

Data brief

DB3781 - Rev 1 - February 2019For further information contact your local STMicroelectronics sales office.

www.st.com

1 Schematic diagrams

Figure 1. STEVAL-MKI187V1 - STM32 section

SWDIOSWCLK

SPI1_NSSSPI1_SCK

SPI1_MOSISPI1_MISO

I2C3_SCLUART1_TXUART1_RXEXT_GPIO0EXT_GPIO1

I2S5_CK

INT_BARO

I2C3_SDA

I2C1_SCL

INT_ALS

BOOT0

GND

10KR5

NRST

100nFC5

GNDGND

15pF

C4

15pF

C3

X2520-16MHz

1

2

3

4X216MHz

GNDGND

10KR8

GND

LED1/BOOT1

PA010

PA111

PA212

PA313PA414

PA515

PA616

PA717

PA829

PA930

PA1031PA1132

PA1233

PA1334

PA1437

PA1538

PB018

PB119

PB220

PB339

PB440

PB541PB642

PB743

PB845

PB946

PB1021

PB1225

PB1326PB1427

PB1528

PC13 2

PC14-OSC32_IN 3

PC15-OSC32_OUT 4

PH0-OSC_IN 5

PH1-OSC_OUT 6

NRST 7

BOOT0 44

U1A

STM32F412CG

VSS23

VSS35

VSS47

VSSA/VREF-8

VBAT1

VCAP_122

VDD 24

VDD 36

VDD 48

VDDA/VREF+ 9

EPAD 49

U1B

STM32F412CG4.7uFC15

GNDGND

4.7uFC14

GND

1uFC12

+1V8

GND

100nFC17

100nFC18

100nFC19

GND GND GNDGND

15pFC1

GND

32.768KHzABS06-107-32.768kHz-T

X115pFC2

0R

R4

0R

R3

100KR7

+1V8

100nFC13

GND

100nFC16

GND

LED0WIRQ1

INT_HUM/SW_USR

WAKEUP

WIRQ2

I2C1_SDAI2S5_SD

INT_HALL

INT_ACCG

SPI2_MOSISPI2_MISOSPI2_SCKSPI2_NSSI2C2_SCLI2C2_SDA

i Low ESR

R9DNM+1V8

R12DNM+1V8

iNOT FITTED

NRST

+1V8+1V8

+1V8

+1V8

Bootloader I2C 0x46

12

BT2SW_USR

10KR6

+1V8

GND

INT_HUM/SW_USR

1TP

2TP

3TP

4TP

5TP

6TP

I2C2_SCL

I2C2_SDA

SPI2_MISO

SPI2_MOSI

SPI2_NSS

SPI2_SCK

12

BT1SW_RST

NP 4K7NP 4K7

STEVAL-MKI187V1Schematic diagrams

DB3781 - Rev 1 page 2/6

Figure 2. STEVAL-MKI187V1 - MEMS sensor and microphone

SDO1

SDx2

SCx3

INT14

VD

DIO

5

GN

D6

GN

D7

VDD 8

INT2 9OCS 10

NC 11

CS

12

SCL

13

SDA

14

U2LSM6DSL

GND

GND

I2C2_SCL

I2C2_SDA

GND

100nF

C10

GND

GND

GND

CS 6DRDY3 SCL

2

Vdd

1

SDA

4

GN

D5

U4HTS221

ACC+GYRO

BARO+TEMPHUM

GND

100nF

C8

2.2uFC6

GND

GND 9

Vdd 10

SDO5

SDA4

Res3 SCL

2

Vdd

_IO

1

CS

6

INT1

7

GND 8

U3LPS22HB 100nF

C7

4k7R11

4k7R10

Vdd 9

Vdd_IO 10

NC

11

NC

12C

15

SDA/SDI/SDO4

CS3

NC2

SCL/SPC1

GN

D6

INT_DRDY 7

GND 8

U5LIS2MDL

Vdd 1

GN

D5

CLK3

Data4L/R 2

U8MP34DT05-A

220nFC28

GND

INT_ACCG

GND+1V8

MDRDYIN

T_B

AR

O

GND

I2S5_SD

+1V8

GNDGND

100nF

C261uFC27

GND

10uF

C23

GND

100nF

C24

+1V8

+1V8

+1V8

+1V8

+1V8

+1V8

MAG

MIC

2k2R2 2k2

R1

+1V8

MDRDY

+1V8

+1V8

100nF

C25

GND

+1V8

I2S5_CK

SPI2

_MO

SI

SPI2

_NSS

SPI2_MISO

SPI2

_SC

K

0x5D 0x5F

100nFC11

GND

4.7uF

C9

GND

MEMS Microphone

MEMS Sensor

0R

R54DNM

INT_HUM/SW_USR

Figure 3. STEVAL-MKI187V1 - board schematic

LED 10 12

LED 11 13

LED 8 10LED 9 11

LED 12 14

LED 15 17RST18

LED 13 15

LED 14 16

LED 2 3

LED 3 4

LED 0 1

LED 1 2

LED 4 5

LED 7 8

GND 9

LED 5 6

LED 6 7

SCL19

SDA20

VDD21

A022A123

A224

DAP 25

U10LP3943ISQ

R17680R D1 BLUER18 680R D2 BLUE

R19 680R D3 BLUER20 680R D4 BLUER21 680R D5 BLUER22 680R D6 BLUER23 680R D7 BLUER24 680R D8 BLUER25680R D9 BLUER28680R D10 BLUER29680R D11 BLUER30680R D12 BLUER31680R D13 GREEN

R32680R

R35680R

R39680R

GNDNTA4153NT1G

3

1

2

T2

NTA4153NT1G

3

1

2

T1

I2C3_SDA

I2C3_SCL

+1V8

R274k7

R264k7

+3V3

GNDGNDGND

LED0 LED1/BOOT1

R45680RR48680R

D17 REDD18 GREEN

+5V+5V

+3V3

0x60

1uFC31

GND

100nF

C30

GND

E01

E12

E23VSS4 SDA 5SCL 6WC 7VCC 8

U9M24C02-F

GNDGND

100nFC29

GND

+1V8

I2C1_SCLI2C1_SDA

0x50

1

2

3 6

5

4R

G

B

D14

LED_RGB

LED13LED14LED15

LED13

LED14

LED15

1E1

1B2

2C3

1C 6

2B 5

2E 4

U13

DMC56404

EEPROM

VCC1

GND2 OUT 3

MRMS501AU7AMR_HALL+1V8

GND

INT_HALL

XSHUT5

GPIO17

SDA9

SCL10DNC8

AVDDVCSEL 1

AVDD 11

AVSSVCSEL 2

GND 3GND2 4

GND3 6

GND4 12

U6VL53L0X

GND

100nFC21

4.7uFC20I2C2_SCL

I2C2_SDA

R1410K

+1V8

+3V3

R1310K

+1V8

INT_ALS

100nF

C22

GND0x29

PROX

Gesture detectorVDD1

GND2 SCL 3SDA 4

U14

ISL290341uF

C40

GND

I2C2_SCL

I2C2_SDA

0x44

100

R49

+3V3

ALS

STEVAL-MKI187V1Schematic diagrams

DB3781 - Rev 1 page 3/6

Figure 4. STEVAL-MKI187V1 - power supply section

GND

1uFC34

+5V

GND

33nFC32

+3V3

12

P1+5V

GND

GN

D2

EN3 Bypass 4

Vout 5Vin1

U11 LDS3985M33R

GND GND

2u2C35

100nF

C36

GND GND

1uFC37

+5V

GND

33nFC33

GN

D2

EN3 Bypass 4

Vout 5Vin1

U12 LDS3985M18R

GND GND

2u2C38

100nF

C39

GND

+1V8

EXT_PWR

Figure 5. STEVAL-MKI187V1 - connector section

1 23 45 67 89 10

P2

1.8V 50mA I2C/GPIO

+1V8

R162K2

R152K2

GND

I2C3_SCLI2C3_SDAEXT_GPIO0

I2C3_SCLI2C3_SDAEXT_GPIO1

GND

12345

P4

JTAG

GND

SWCLK

SWDIO

UART1_TXUART1_RX

NRST

NTA4153NT1G

3

1

2

T3

NTA4153NT1G

3

1

2

T4

R3410K

R3810K

+1V8 +3V3

+3V3+1V8

BAT54K

D15

+3V3R3610K

R3310K

+1V8

+1V8

WIRQ1

SWCLKSWDIO

WIRQ2

R44NP_0R DNMR46NP_0R DNM

iNOT FITTED

NRST

SPI1_SCKSPI1_MISOSPI1_NSSSPI1_MOSI

R43NP_0RDNMR42

NP_0RDNM

BAT54KD16

WAKEUP

i NOT FITTED

GND

GND

GND

GND+5V

GND1 GND 2

UART0_CTS3 PWR_BTN_N 4

UART0_TXD5 RST_BTN_N 6

UART0_RXD7 SPI0_SCLK 8

UART0_RTS9 SPI0_DIN 10

UART1_TXD11 SPI0_CS 12

UART1_RXD13 SPI0_DOUT 14

I2C0_SCL15 PCM_FS 16I2C0_SDA17 PCM_CLK 18

I2C1_SCL19 PCM_DO 20

I2C1_SDA21 PCM_DI 22

GPIO-A/WKUP23 GPIO-B 24

GPIO-C25 GPIO-D 26

GPIO-E27 GPIO-F 28

GPIO-G29 GPIO-H 30GPIO-I31 GPIO-J 32

GPIO-K33 GPIO-L 34

+1.8V35 SYS_DCIN 36

SYS_DCIN 38

GND 40+5V37

GND39

P3

96board LS Expansion Connector

BOOT0

GND

I2C1_SCLI2C1_SDA1

23

P5

UART 1.8VI2S5_CK

I2S5_SD

SPI1_NSS R47NP_0RDNM

R40 0RRXTX

GND

R37 0R

R41 0R

12

P6

Header 2

R50100K

R51100K

R52100K

R53100K

+1V8

STEVAL-MKI187V1Schematic diagrams

DB3781 - Rev 1 page 4/6

Revision history

Table 1. Document revision history

Date Version Changes

13-Feb-2019 1 Initial release.

STEVAL-MKI187V1

DB3781 - Rev 1 page 5/6

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STEVAL-MKI187V1

DB3781 - Rev 1 page 6/6