ST MKI024V1 User Manual

STEVAL-MKI024V1

MEMS 3-axis ±2g /±8g smart digital output demonstration board

based on the "nano" accelerometer LIS331DL

Features

■ Graphical user interface

■ Mini USB connector

■ Control switches

■ MEMS sensor

■ LED indicators

■ ST72F65x - USB microcontroller

Description

The STEVAL-MKI024V1 is a demonstration board
designed to provide the user with a complete,
ready-to-use platform for evaluation of the
LIS331DL, the new MEMS belonging to the
"nano" family of ST motion sensors.

STEVAL-CBL005V1

The LIS331DL is the smallest consumer low
power three axes linear accelerometer and it
features digital I2C/SPI serial interface standard
output, smart embedded functions, it has
dynamically user selectable full scales of ±2g
/±8g and it is capable of measuring accelerations
with an output data rate of 100 Hz or 400 Hz.

Data brief

The device may be configured to generate inertial
wake-up/free-fall interrupt signals when a
programmable acceleration threshold is crossed
at least in one of the three axes. Thresholds and
timing of interrupt generators are programmable
by the end user.

In addition to the MEMS sensor, the
demonstration board utilizes an ST72F65x - USB
microcontroller which functions as a bridge
between the sensor and the PC, on which it is
possible to use the graphical user interface (GUI)
included with the kit or dedicated software
routines for customized applications.

April 2009 Doc ID 15563 Rev 1 1/4

For further information contact your local STMicroelectronics sales office.

www.st.com

4

Circuit schematic STEVAL-MKI024V1

1 Circuit schematic

Figure 1. Schematic diagram

A

B

C

D

8

TP2

100n F

C19

VCC

5

8877665

2233441

U4

2
1

1

+

C18

2.2uF

Vdd_ dutVddf

C13
+

C11

LE25

D3

D4

10uF

100R

R9

100R

R10

INT2

R13

13

12

GND

Reserved

Vdd_ IO1SCL

0R

0R

R12

INT1

10

9

11

Int2

Int1

GND

CS

cs_pad

8

Reserved

SDO

7

miso

SDA

6

mosi

GND

NC2NC

3

4

5

sck

100n F

Motion Sensor

U1

VDD

14
15

GND

16

7

Current_Measure

6

5

4

J5

iccsel

1

J4

2

6

8

7

GND

SHDN

VOUT

C2-

C1-1C1+

U3

2

3

220n F

220n F

C14

C15

100R

R3

Vddf

100R

R2

C12

100n F

5

VCC

C2+

ST662 ABD

4

2STR2215

Q1

VCC

GR

D2

C17

4.7uF 16V

+

+

C16

4.7uF 16V

3

2

R5

1

R4

10K

RledGled

SO642

Q2

31

470R

2

1K

R8

DFU_SEL

Cosc2

33pF

12MHz

Yoscm

oscin oscout

33pF

Cosc1

100n F

C7

NReset

SW1

Riccsel

10K

icccl k

nRESET

iccsel

iccdata

1 2

3 4

56789 10

ICP

J2

TP1

VCC

1

INT2

2

INT1

3

mosi

4

miso

5

sck

6

cs_pad

7

CS1

SPI

J3

8

7

6

5

4

3

2

180R

1

A

R1

D1

B

2/4 Doc ID 15563 Rev 1

100n F

C6

PD037PD1

36

PB213PB314PB4

+10uF

220n F

C8

VCC

33

+

4.7uF

PC4

PC534PC635PC7

PB5

16

15

47nF

C3

Vss1

32

Vdd1

31

SCK

30

sck

MOSI

mosi

29

MISO

28

miso

SS

Vddf

27

PA7

26

PA6

INT2

25

PA5

INT1

24

PA4
PA3
PA2
PA1
PA0
PB7
PB6

10K

R11

23

ST
PD

22
21

cs_pad

20
19
18
17

R7

10K

D

3

SW3

SW2

2

1

41

42

40

38

43

46

48

47

U2

ST726 5X_TQFP6 4

PWM1

49

PWM0

50

icc sel

RESET

nRESET

51

SCL

52

SDA

53

AIN0

54

AIN1

55

USBEN

56
57

iccclk

58

icc data

Vdd2

59

Vdda

60

Vssa

100n F

C5

+

4.7uF

C2

C4

100n F

+10uF

VCC

C1

5

4

1

3

2

nc

V+

DP

DM

GND

USB_mini_B

J1

61

Vss2

62

OSCIN

63

oscin
oscout

64

UVss1UDM2UDP3UVcc4UVdd

PD239PD3

AIN6

AIN2

AIN344AIN445AIN5

Vpp/ICCSEL

OCMP2

OCMP1

ICCCLK

ICCDATA

OSCOUT

C

5

Vddf6Vssf7PE58PE69PE7

Vddf

1.5K

R6

PB011PB1

12

10

DFU_SEL

CS1

Gled

Rled

C10

C9