ST STEVAL-IFS001V1 User manual

April 2006 Rev 1 1/14
UM0223
User manual
STEVAL-IFS001V1 evaluation kit with MEMS
Introduction
This user manual gives an overview of the use of STEVAL-IFS001V1 kit with MEMS (Micro-
Electro-Mechanical System) evaluation board.
As shown in the next section, this evaluation board consists of the DK3420 (uPSD
evaluation board) and the ST-MEMS-xx-EVAL (MEMS evaluation module). When connected
together as an evaluation kit, MEMS applications can be evaluated and measured through a
USB connection to a PC. A brief introduction to the MEMS software, MEMS USB Reader
7.x, is also provided.
MEMS can be used in a variety of vibration sensor and intelligent movement estimator
situations, for example:
■Vibration analysis
– Motor control
– High buildings
■Control of position
– Stability system for caravans
– Stability for cable cars
■Sport
– Sport shoes
– Speedometers
■Automotive
–Blackbox
– Intelligent driver sensors
– Car alarms
■Navigation
– Dead-reckoning for GPS
■Logistics
– Blackbox for containers (sensoring)
■Robotics
– Control of robot arms (welding robots)
■Security
– Vibration detection (broken window alarm)
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Contents STEVAL-IFS001V1
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Contents
1 Overview of MEMS evaluation boards . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 I2C and SPI use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 I2C and SPI connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2 Recommendations for I2C use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3 Recommendations for SPI use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 uPSD software use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1 Digital or analog module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2 LED signalization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.3 Selection of operation mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.4 On-line measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.5 Off-line measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.6 Read out data from Flash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5 MEMS software - MEMS_USB_Reader_7x . . . . . . . . . . . . . . . . . . . . . . 12
5.1 Initial window and features overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.2 MEMS values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.3 Butterworth filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.4 FFT analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

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STEVAL-IFS001V1 Overview of MEMS evaluation boards
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1 Overview of MEMS evaluation boards
Figure 1. STEVAL-IFS001V1
This consists of DK3420 and ST-MEMS-XX-EVAL
Figure 2. DK3420 - USB Demonstration board with µPSD Turbo Plus
For a pin description, see Section 2. Further information is available in the uPSD34xx
datasheet and online, from http://www.st.com

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Figure 3. ST-MEMS-DQ-EVAL
The MEMS module ST-MEMS-DQ-EVAL is designed for the evaluation of a MEMS
application which can be used in a variety of vibration sensor and intelligent movement
estimator situations.
For a pin description, see Section 2. Additionally, a description of I2C and SPI use is
provided in Section 3.
Additionally, for further information on this module, refer to the user manual UM0152 “MEMS
Module STMEMSDQ-EVAL1 Dedicated to uPSD Evaluation Kit DK34XX”.
Features include:
●LIS3LV02DQ (QFN28)
●I2C or SPI
●3x buttons
●3x LEDs

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Figure 4. ST-MEMS-AQ-EVAL (check for availability)
Components include:
●LIS3L02AQ (QFN44)
●3x analog outputs
●3x buttons
●3x LEDs

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Pin description STEVAL-IFS001V1
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2 Pin description
Legend:
●AINx - Analog input x
●SPC - SPI clock
●SDI - SPI data input (view from uPSD)
●SDO - SPI data output (view from uPSD)
●CS - SPI chip select
●UART0out - UART data out
●UART0in - UART data in
●SDA - I2C data
●SCL - I2C clock
Table 1. DK3420 - USB demonstration board with µPSD Turbo Plus and ST-MEMS-
DQ-EVAL
H1 5V PB0 PB2 PB4 PB6
LED6 RESET 3.3V
P1.5
Ain5
BUT5
P1.3
Ain3
P1.1
Ain1
H10 GND PB1 PB3 PB5
LED5
PB7
LED7
P1.6
Ain6
BUT6
P1.7
Ain7
BUT7
P1.4
Ain4
P1.2
Ain2
P1.0
Ain0
H3 PC2 P4.6
SDO
P4.4
SPC P4.2 P4.0 P3.3
P3.1
UART0
out
P3.5 P3.7
SCL GND
H30 GND P4.7
CS
P4.5
SDI P4.3 P4.1
P3.0
UART0
in
P3.2 P3.4 P3.6
SDA GND
H1 & H10 connections
H3 & H30 connections

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3 I2C and SPI use
Figure 5. Board schematics for ST-MEMS-DQ-EVAL
3.1 I2C and SPI connections
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
3V33V3
GNDGND
3V3 3V3
P17
3V3
GNDPB5
3V3
PB6PB7
P16 P152V4
GND
CS
3V3
SDA_SDI
SCL_SPC
PB0
VUSB
PB2
PB4 CK
RSTn
PB6 PB6
Ai5 P15
V3.3 3V3
Ai3
Ai1
P4.6 SDA_SDI
P3.5
P4.2
P3.7 SCL_SPC
PC2
P3.1
P4.0
P4.4 SCL_SPC
GND GND
P3.3
P4.3
GNDGND
GNDGND GNDGND
P4.5SDO
P3.0
P4.1
P4.7CS
SDA_SDISDA_SDI P3.6SDA_SDI
P3.4
P3.2RDYINT
PB1
Ai0
PB7PB7
Ai4
Ai2
Ai6P16
GNDGND
PB5PB5
Ai7P17
PB3
GND
GND GND
2V4
2V4 2V4
RDYINT
SDO SDA_SDI SCL_SPC CS
CK
GNDGND
2V43V3
2V4
GND
3V3 2V42V4
Title
Size Document Number Rev
Date: Sheet of
STEVAL-IFS001V1 0.1
Digital MEMS module
A
11Friday, March 03, 2006
Title
Size Document Number Rev
Date: Sheet of
STEVAL-IFS001V1 0.1
Digital MEMS module
A
11Friday, March 03, 2006
Title
Size Document Number Rev
Date: Sheet of
STEVAL-IFS001V1 0.1
Digital MEMS module
A
11Friday, March 03, 2006
R15
10k
R15
10k
R34
4k7
R34
4k7
R27
330
R27
330
1
2
3
4
5
6
7
8
9
10
H1
CON10
H1
CON10
1
2
3
4
5
6
7
8
9
10
H30
CON10
H30
CON10
12
B5B5
C1
100nF
C1
100nF
R17
10k
R17
10k
NC
1
GND
2
VDD
3
reserved
4
GND
5
RDY/INT
6
NC
7
NC
8
SDO
9
SDA/SDI/SDO
10
VDD_IO
11
SCL/SPC
12
CS
13
NC
14
NC 15
CK 16
GND 17
reserved 18
VDD 19
reserved 20
NC 21
NC 22 NC 23 NC 24 NC 25 NC 26 NC 27 NC 28
U8
LIS3LV02DQ
U8
LIS3LV02DQ
R25
330
R25
330
R16
10k
R16
10k
1
2
3
4
5
6
7
8
9
10
H10
CON10
H10
CON10
R36
4k7
R36
4k7
1
2
3
4
5
6
7
8
9
10
H3
CON10
H3
CON10
C2
100nF
C2
100nF
C4
100nF
C4
100nF
L6L6
R37
4k7
R37
4k7
L7L7
R35
0
R35
0
12
B7B7
12
B6B6
C3
100nF
C3
100nF
L5L5
R26
330
R26
330
3
Vin
1
Vout
2
GND
LE25
U11 LE25_TO92
LE25
U11 LE25_TO92
Signal (on MEMS) I2C (on uPSD) SPI (on uPSD)
SCL_SPC P3.7 P4.4
SDO NC P4.5
SDA_SDI P3.6 P4.6
CS NC P4.7

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3.2 Recommendations for I2C use
●With I2C, the use of R36 & R37 pull-up resistors (4k7) is advised
●The use of resistor R34 (10k) is not normally necessary as uPSD has an internal pull-
up of around 100k.
●Because SCL_SPC and SDA_SDI are used for I2C and SPI together, care should be
taken with the following instructions:
– First (important), disable SPI and set the SPI pins as floating inputs
– Set P4.7 (CS) as GPIO output and write ‘1’ to activate I2C on the MEMS chip
–EnableI
2C on your micro and start the communication
3.3 Recommendations for SPI use
●With SPI, the use of resistors R36, R37 is NOT advised
●The use of resistor R34 (10k) is not normally necessary as uPSD has an internal pull-
up of around 100k.
●Because SCL_SPC and SDA_SDI are used for I2C and SPI together, care should be
taken with the following instructions:
– First (important), disable I2C and set the I2C pins as floating inputs
– Activate your SPI. P4.7 is a part of SPI and should be ‘0’, otherwise set P4.7 (CS)
as GPIO output and write ‘0’ directly. This instructs the MEMS chip to use SPI
– Start the communication

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4 uPSD software use
4.1 Digital or analog module
The program automatically detects whether a module is digital or analog.
The recognition is based on the value on pin P3.3. A digital module has this pin
unconnected which is the same as logic ‘1’ because of an internal uPSD pull-up. Analog
modules must employ a pull-down resistor to enable the detection of logic ‘0’.
4.2 LED signalization
●LED5 (green) blinking
Data is being read. Digital modules are using I2C, analog modules are using ADC.
●LED6 (yellow) blinking
This indicates USB communication, data is being sent.
●LED7 (red) blinking
The program is running, this led is toggled in main.
Immediately after the module is plugged in, all LEDs are lit while initialization is in process.
When uPSD, the peripherals (I2C,ADC, etc) and MEMS are initialized, the LEDs are turned
off. Immediately following this, the main starts and LED7 blinks.
●If LED7 doesn't start blinking, the initialization will have failed.
a) Check hardware
b) Try to restart the PC
c) Re-program uPSD
d) If still not working, contact support
4.3 Selection of operation mode
During the initialization an operation mode can be selected by pressing buttons:
●no button is pressed
On-line measurement (default)
●BUT5 is pressed
Off-line measurement (it erases the Flash for new measurements which takes around
5s for the 256KB flash)
●BUT6 is pressed
Read out data from Flash (useful after the off-line measurement)
●BUT7 is pressed
No effect.
Note: Press the button first and then plug the module into the USB.

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4.4 On-line measurement
During on-line measurement, data is read from MEMS and sent via USB to the PC.
Logically, all three LEDs should blink. In this mode, the buttons have the following meanings:
●no button is pressed
uPSD sends data from MEMS to the PC (a packet with MEMS data)
●BUT5 is pressed
No effect.
●BUT6 is pressed
No effect.
●BUT7 is pressed
In the case of digital MEMS, uPSD reads its registers and sends this information via
USB (a packet with registers)
4.5 Off-line measurement
Ready to start the measurement. Normally LED7 blinks.
●no button is pressed
No effect.
●BUT5 is pressed
Pause/Stop measurement.
●BUT6 is pressed
Start measurement, LED5 blinks to indicate data is being read and stored (it stops
automatically when the Flash is full).
●BUT7 is pressed
If measurements have not started, the sample frequency can be changed. Possible
frequencies are 40 or 160 Hz. The selection is indicated by the LED7 blinking speed.
4.6 Read out data from Flash
Ready to start sending data stored in Flash via USB. Normally LED7 is blinking.
●no button is pressed
No effect
●BUT5 is pressed
Start sending data. uPSD sends data from Flash and LED6 blinks (a packet with
MEMS data). It reads the entire Flash. Any part which doesn't contain relevant MEMS
data you will get 0xFF. After the end of the Flash range, 0xFF will also be sent. 0xFF
Off-line measure time @40Hz @160Hz
128KB (uPSD3433) 576s 136s
256KB (uPSD3434) 1092s 273s

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values translate as <-1,-1,-1> readings on the PC MEMS USB Reader, which should
be considered to detect both false readings and end of Flash data.
●BUT6 is pressed
No effect.
●BUT7 is pressed
No effect.

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5 MEMS software - MEMS_USB_Reader_7x
5.1 Initial window and features overview
Figure 6. Screenshot of initial screen of MEMS USB Reader 7.1
Main features available in the MEMS USB Reader include:
●MEMS values in time graph
●Butterworth filters
●FFT analysis
5.2 MEMS values
Figure 7. Screenshot showing MEMS values in time graph
Copy data
to clipboard
Paste from clipboard into Excel

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Use the MEMS Values screen to:
●Copy data into the Excel directly via clipboard
●Copy the graphic figure (graph) as a metafile via clipboard
●Save data into a CSV file
5.3 Butterworth filters
Figure 8. Screenshot of the filtering window with Butterworth filter options
Filtering options include:
●Butterworth low-pass & hi-pass filters order 1-4
●Butterworth band pass filter order 1
●It's possible to hide the axis (currently, only the Y-Axis is shown)
5.4 FFT analysis
Figure 9. Screenshot of FFT analysis
FFT (Fast Fourier Transform) analysis features and options include:
●FFT for 16, 32, 64, 128 samples
●Allows FFT zoom (filling with zeros)
●Allows to change FFT overlap
●Copy of the figure to clipboard as a metafile

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