ST MKI024V1 User Manual

STEVAL-MKI024V1

MEMS 3-axis ±2g /±8g smart digital output demonstration board based on the "nano" accelerometer LIS331DL

Data brief

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.

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

Circuit schematic	STEVAL-MKI024V1

1 Circuit schematic

Figure 1. Schematic diagram

A

B

8

TP2

C19

100nF

VCC

8

7

6

5

8 7 6 5

7

U4

1 2 3 4

LE25

1

2

3

4

+

C18

2.2uF

J5 rrentuC Measure

2

6

1

+ C13

10uF

D3

D4

R9

100R

R10

100R

INT2

R13 0R

5

C11

100nF

sor

INT1

R12

0R

en

13

12

11

10

9

S

14U1Motion

GND

GND

Int1

Reserved

Int2

cs_pad8

VDD

CS

15

Reserved

SDO

7

miso

GND

SDA

16

Vdd IO

NC

NC

SCL

GND

6

mosi

4

1

2

3

4

5

sck

3

2

R1	180R
1
D1
A	B

			C	D
	iccsel
J4	1		C17 4.7uF 16V	8

2

100nF

+

C12

+

8

7

6

5

16V

SHDN

GND

VOUT

VCC

C16 4.7uF

U3

C1-

C1+

C2-

C2+

ST662ABD

7

1

2

3

4

220nF

220nF

TR2215

Q2 O642S

C14

C15

2

3

1

3

Q1

1

R5

470R

2

C7

100nF

S2

VCC

R4

10K

R8

1K

SW1

NReset

6

DFU SEL

Riccsel

10K

iccdata iccclk nRESET iccsel

2 4 6 8

10

J2

1 3 5 7 9

ICP

5

VCC

TP1

100R

cout

Cosc2

33pF

3R

so

2

INT2

1

RledGled

sYocm

12MHz

INT1

5

Vddf

100R

mosi

3

R2

D2

RG

cinso

c1sCo

pF33

4

3J

PIS

4

miso

sck

6

cs_pad

7

CS1

	C5	100nF
		+
	C2	4.7uF
	C4	100nF
VCC	C1	10uF +

1 V+

4 nc

J1

3 DP

2 DM

5 GND USB_mini_B

ST7265X_TQFP64

U2

49 50iccsel 51nRESET 52 53 54 55 56 57iccclk 58iccdata 59 60 61 62 63oscin 64oscout

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

WM1PWM0

AIN6

AIN5 AIN4

AIN3

AIN2

OCMP2

OCMP1 PD3 PD2 PD1 PD0 PC7 PC6

PC5

PC4

Vss1

Vpp/ICCSEL

Vdd1

RESTE

SCK

SCL

MOSI

SDA

MISO

AIN0

SS

AIN1

PA7

USNBE

PA6

PA5

ICCCLK

ICCDATA

PA4

Vdd2

PA3

Vdda

PA2

Vssa

PA1

Vss2

PA0

OSCIN

PB7

OSCOUT

UVdd

PB6

UVss

UDM

UDP UVcc

Vddf

Vssf

PE5 PE6 PE7 PB0 PB1 PB2 PB3

PB4 PB5

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

Vddf

Rled

Gled

DFU SEL

CS1

C10 10uF

+

C9

220nF

VCC				C6	100nF
		+
				C3	4.7uF
32
31
30		sck
29		mosi
28		miso
27		Vddf
26
25		INT2
24		INT1
23		ST
22		PD
	cs_pad21
20
19
18
17

R6 1.5K

C8 47nF

C

3

R11	10K
	SW3
	SW2
R7	10K

2

1

D

2/4	Doc ID 15563 Rev 1