ST Microelectronics S R L WESU1 Evaluation Board User Manual ST Platform name

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Document Type	User Manual
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Date Submitted	2015-12-18 00:00:00
Date Available	2016-04-20 00:00:00
Creation Date	2015-10-08 12:26:01
Document Lastmod	2015-10-19 15:30:09
Document Title	ST Platform name
Document Author:	Carmen BRIGANTE;ignazio.aleo@st.com

UMxxxx
USER MANUAL
Evaluation Board
STEVAL-WESU1
Introduction
The STEVAL-WESU1 is a System Evaluation Board designed to provide a cost effective solution
for precise motion sensing in wearable applications. The system is featuring a low power ARM
Cortex-M3 microcontroller unit (STM32L151), an iNEMO inertial module (LSM6DS3), a high
performance magnetometer (LIS3MDL), a barometric pressure sensor (LPS25HB), a Bluetooth®
low energy wireless network processor (BLUENRG-MS) and power management circuitry that
allows fast charging and precise energy estimation (STNS01 and STC3115). The connectivity
granted by the best in class BLUENRG-MS and supported by the integrated balun (BALF-NRG01D3) permit to maximize the RF performances with low area occupancy and design effort and
pass the RF Test for FCC certification (FCC ID: S9NWESU1) and IC certification (IC ID: 8976CWESU1).
An Android and iOS APP, available on Google Play and Apple Store, can be used for displaying
information sent by the STEVAL-WESU1 through BLE connectivity as well as for setting operative
modes.
Figure 1. STEVAL-WESU1 evaluation board
July 2015
Rev 0.1
STMicroelectronics Confidential
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Table of Contents
Board Description and Getting started ................................................................................... 4
1.1
Getting started ........................................................................................................................ 5
Hardware description ............................................................................................................... 8
2.1
Microcontroller ........................................................................................................................ 8
2.2
Sensors .................................................................................................................................. 8
2.2.1
LSM6DS3 ............................................................................................................................... 8
2.2.2
LISM3DL ................................................................................................................................ 8
2.2.3
LPS25HB ................................................................................................................................ 9
2.3
BLUENRG-MS and BALF-NRG-01D3 ................................................................................... 9
2.4
Power management ............................................................................................................... 9
2.4.1
STNS01 and STLQ015 .......................................................................................................... 9
2.4.2
STC3115 .............................................................................................................................. 10
2.5
Connectors ........................................................................................................................... 10
2.5.1
Battery connector ................................................................................................................. 10
2.5.2
SWD Connector and external peripherals............................................................................ 11
2.5.3
USB Connector .................................................................................................................... 12
2.5.4
Exposed pad connector ....................................................................................................... 12
2.5.5
uFL connector ...................................................................................................................... 12
2.6
Buttons and LEDs ................................................................................................................ 12
Formal notices required by the U.S. Federal Communications Commission ("FCC") ....... 13
Formal notices required by the Industry Canada ("IC") ....................................................... 14
Board schematic and bill of material ..................................................................................... 15
2/22
5.1
Bill of material ....................................................................................................................... 15
5.2
Schematic ............................................................................................................................. 19
Revision history ...................................................................................................................... 20
Version 0.1
STMicroelectronics Confidential
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1 Board Description and Getting started
The STEVAL-WESU1 is a System Evaluation Board designed and optimized in order to be a
reference design for users would made their own wearable electronic devices. In fact, the system
architecture is made up of hardware, firmware and software solutions to accelerate the overall
development of all applications: from embedded end-customer devices to mobile software
development. The design choices have been taken to address accurate motion tracking suitable
for training in every kind of activity or sport.
Main Components:
STM32L151VEY6, ultra-low-power ARM Cortex-M3 MCU with 512 Kbytes FLASH, 48kBytes of
RAM in WLCSP100 package
BLUENRG-MS, Bluetooth Low Energy (BLE) single-mode network processor, compliant with
Bluetooth specification core 4.0
BALF-NRG-01D3, 50 Ω balun for BLUENRG-MS transceiver with integrated harmonic filter
LSM6DS3, iNEMO
(±245/500/2000dps)
LIS3MDL, MEMS 3D magnetometer (±4/8/12/16 gauss)
LPS25HB, MEMS pressure sensor, 260-1260 hPa absolute digital output barometer
STC3115, Gas gauge IC with alarm output
STNS01, Li-Ion linear battery charger
STLQ015XG30R, linear voltage regulator
inertial
module
3D
accelerometer
(±2/4/8g)
3D
gyroscope
DRAFT
The Figure 2 shows a function block diagram of the board where the sensors and the BLUENRGMS are connected to microcontroller through two separate SPI peripherals, meanwhile the power
management is driven by I2C peripheral. The system can be powered with USB connected to PC
or through specific battery. The USB is also used for battery recharge. Figure 3 shows the block
diagram of the RFIC BLUENRG-MS.
Figure 2. Functional Block Diagram
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Figure 3. Block Diagram of RFIC: BlueNRG-MS
DRAFT
1.1 Getting started
The system is delivered fully assembled and connected with battery and with LDO off (shipment
mode, with 2uA power consumption).
It can be simply switched ON with USB-powered cable insertion (micro B male plug). The USB
port connector can be used for battery charging.
The system takes up to 160mA (@5V) to recharge the battery; for this reason you can use both
USB wall adapter and PC port with this capability. Two LEDs (LED1 and LED2, see Figure 3)
describes the Application Status and the Battery Charging Status.
The Charging LED (LED 2) could be:
- Light ON, the USB plug is correctly connected and the board is charging;
- Light OFF, the board is not charging (use USB cable reconnection to force re-start);
Blinking (approximately at 1Hz), charging failure (e.g. over-temperature, three wires battery not
connected);
It is important to avoid deep discharge (< 30%) to maintain battery integrity and to prevent longterm malfunctioning.
The User Button (see Figure 4) can be pressed to enter and exit the Stop MODE.
At power on the Application LED (LED1) starts with one smooth blink and in normal operation it
blinks at 2s interval; after BLUENRG-MS connection the blinking interval becomes 1s and
STEVAL-WESU1 system reads sensors data and sends it to a Bluetooth Smart Ready device; the
data is displayed using a dedicated App.
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A custom (1.27 mm pitch) SWD connector is used to have a compact solution, since to program
the on-board STM32L151 it has been included in the package a specific adapter useful to be
connected to a programmer tool (e.g. ST-LINK/v2).
Figure 4. Board Layout – top layer
DRAFT
Figure 5. Board Layout – Bottom layer
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Once it has been verified the battery is enough charged, the board is ready to be used. To
visualize the information sent through the Bluetooth Low Energy connectivity is
fundamental to install one of the App available for the Smartphone and Tablet:
- ST WESU Android App, available on Google Play;
ST WESU iOS App available on Apple Store.
To use this App is need a Smartphone or Tablet supporting the BLE connectivity, i.e.
iPhone 4S and subsequent or, an Android based device with Android OS 4.3 or higher.
DRAFT
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2 Hardware description
This section describes the main components present on the board and described in
Figure 3 and 4.
2.1 Microcontroller
STM32L151VEY6 is an ultra-low-power microcontroller unit based on ARM Cortex M3. It
features a great range of low power modes and an efficient voltage scaling that allows
power saving.
2.2 Sensors
Thanks to their overall integration level the embedded sensors offer great flexibility in terms
of accuracy of the system and in terms of power consumption.
The integrated sensors perfectly fit the needs of an accurate AHRS algorithm (e.g.
embedded iNEMO-Engine running on the STM32L151VEY6), height estimation and
everything needed for wearable motion tracking: from extreme low power activity tracker to
more advanced motion reconstruction.
DRAFT
2.2.1
LSM6DS3
The LSM6DS3 is a system-in-package featuring a 3D digital accelerometer and a 3D digital
gyroscope performing at 1.25 mA (up to 1.6 kHz ODR) in high performance mode and
enabling always-on low-power features for an optimal motion experience for the consumer.
Up to 8 Kbyte of FIFO with dynamic allocation of significant data (i.e. external sensors, time
stamp, etc) allows the overall power saving of the system.. ST’s family of MEMS sensor
modules leverages the robust and mature manufacturing processes already used for the
production of micro machined accelerometers and gyroscopes. The various sensing
elements are manufactured using specialized micromachining processes, while the IC
interfaces are developed using CMOS technology that allows the design of a dedicated
circuit which is trimmed to better match the characteristics of the sensing element. The
LSM6DS3 has a full-scale acceleration range of ±2/±4/±8/±16 g and an angular rate range
of ±125/±245/±500/±1000/±2000 dps. High robustness to mechanical shock makes the
LSM6DS3 the preferred choice of system designers for the creation and manufacturing of
reliable products. The LSM6DS3 is available in a plastic land grid array (LGA) package.
2.2.2
LISM3DL
The LIS3MDL is an ultra-low-power high performance three-axis magnetic sensor. The
LIS3MDL has user-selectable full scales of ±4/ ±8/ ±12/±16 gauss. The self-test capability
allows the user to check the functioning of the sensor in the final application. The device
may be configured to generate interrupt signals for magnetic field detection. The LIS3MDL
includes an I2C serial bus interface that supports standard and fast mode (100 kHz and
400 kHz) and SPI serial standard interface. The LIS3MDL is available in a small thin plastic
land grid array package (LGA) and is guaranteed to operate over an extended temperature
range of -40 °C to +85 °C.
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2.2.3
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LPS25HB
The LPS25HB is an ultra-compact absolute piezo-resistive pressure sensor. It includes a
monolithic sensing element and an IC interface able to take the information from the
sensing element and to provide a digital signal to the external world.
Thanks to its great accuracy (1 Pa RMS, 24bit ADC resolution), its bandwidth (1 Hz – 25
Hz) and to its very low power consumption (4uA low power mode, 25uA high performance
mode) the integration of this sensor is suitable for height estimation (e.g. VRU Vertical
Reference Unit) and to enhance standard IMU performances with high frequency altitude
reference.
2.3 BLUENRG-MS and BALF-NRG-01D3
The BLUENRG-MS is a very low power Bluetooth low energy (BLE) single-mode network
processor, compliant with Bluetooth specification v4.1. The BLUENRG-MS can act as
master or slave. The entire Bluetooth low energy stack runs on the embedded Cortex M0
core. The non-volatile Flash memory allows on-field stack upgrading. The BLUENRG-MS
allows applications to meet the tight advisable peak current requirements imposed with the
use of standard coin cell batteries. The maximum peak current is only 8.2 mA at 0 dBm of
output power. Ultra low-power sleep modes and very short transition times between
operating modes allow very low average current consumption, resulting in longer battery
life. The BLUENRG-MS offers the option of interfacing with external microcontrollers using
SPI transport layer.
BALF-NRG-01D3 is a 50Ω conjugate match to BLUENRG-MS (QFN32 package) that
integrates balun transformer and harmonics filtering. It features high RF performances with
a very small footprint and a RF BOM reduction. It has been chosen as the best trade-off for
costs, area occupation and high radio performances. The layout has been optimized to
match 4 layers design and a chip antenna.
DRAFT
2.4 Power management
The power management block includes the STNS01, the STLQ015 and the STC3115
2.4.1
STNS01 and STLQ015
The STNS01 is a linear charger for single-cell Li-Ion batteries.
In STEVAL-WESU1 system it is configured as battery charger and as power path selected
between USB power source and battery power source.
The STNS01's battery charger is designed to charge single cell Li-Ion batteries up to 4.2 V
using a CC-CV charging algorithm (see STNS01 datasheet for more details). When a valid
input voltage is detected, the STNS01 starts the charge cycle and the CHG pin switches
from high impedance to low level. The CHG pin is connected to LED2 to monitor the
charger.
The charging status LED (LED 2) can be:
- solid ON: the USB plug is correctly connected and the board is charging;
- solid OFF: the board is not charging (use USB cable reconnection to force re-start);
- blinking (approx. 1Hz): charging failure (e.g. over-temperature, three wires battery not
connected);
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The SYS pin is the voltage output of STNS01 selected power path. That SYS pin is
connected to the linear voltage regulator STLQ015XG30R that provide a 3V (VDD) to all
other devices.
The STM32L151 is also connected to its SHDN pin to disconnect the power delivery to
most of the devices and enable the shipment mode.
2.4.2
STC3115
The STC3115 includes the hardware functions required to implement a low-cost gas gauge
for battery monitoring. The STC3115 uses current sensing, Coulomb counting and accurate
measurements of the battery voltage to estimate the state-of-charge (SOC) of the battery.
An internal temperature sensor simplifies implementation of temperature compensation.
An alarm output signals a low SOC condition and can also indicate low battery voltage. The
alarm threshold levels are programmable.
The STC3115 offers advanced features to ensure high performance gas gauging in all
application conditions.
2.5 Connectors
The following sub-sections describe the connectors of STEVAL-WESU1 board (see
Figure 4 as reference). The STEVAL-WESU1 has “L” form factor (see Figure 4), suitable
to host the battery (i.e. 12xd25mm @ 85 mAh) in plane with the PCB and optimize the
final design.
DRAFT
Figure 5 Photo of STEVAL-WESU1 with Battery
2.5.1
Battery connector
Battery connector is placed on the shrink side of the board (see Figure 2). Its hardware
connection is shown in Figure 6
Figure 6 Battery connector Schematic
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2.5.2
Error! No text of specified style in document.
SWD Connector and external peripherals
A custom 10 pin (1.27 mm pitch) connector is soldered. It can be used:
- to program on-board microcontroller through a dedicated adapter connected to
programmer tool (like ST-Link) (Figure 7)
- as an expansion connector to allow user to access to other board features as
described in Table1
Figure 7: SWD Connector
DRAFT
Table1 Expansion Connector GPIO Description
Expansion Connector GPIO Description
Exp. Pin J500
Port/Pin
Default func.
Expansion PIN
PWM
USART
ADC
A2
Push Button
TIM2CH3
USART2_TX
ADC_CH2
B0
User LED
TIM3CH3
A3
TIM2CH4
TP512
B12
TIM10CH1
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ADC_CH8
USART2_RX
Rev 0.1
ADC_CH3
ADC_CH18
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2.5.3
USB Connector
The USB connector accepts a micro USB type B and it is used to charge the battery or to
power the board if battery is not present.
2.5.4
Exposed pad connector
STEVAL-WESU1 gives the possibility to reduce form factor by cutting PCB area hosting
USB connector and expansion connector (see cutting line in 8). USB feature will be
accessible by exposed pads on the bottom of the PCB (8). Firmware upgrade will be
possible only over the air or via USB DFU.
Figure 8: STEVAL-WESU1 Exposed Pads
1: USB DP
2: USB 5V
3: GND
4: USB DM
5: TP512 – Expansion PIN 4 test
point
DRAFT
2.5.5
uFL connector
The uFL connector U201 (not mounted) is connected to BLUENRG-MS RF path through
C206 (not mounted). By soldering a 51pF capacitor and desoldering L204, the uFL
connector RF path can be activated, useful for debug purposes.
2.6 Buttons and LEDs
The STEVAL-WESU1 board has 2 LEDs and only one button for user operations.
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3 Formal notices required by the U.S. Federal
Communications Commission ("FCC")
Model: STEVAL-WESU1
FCC ID: S9NWESU1
Any changes or modifications to this equipment not expressly approved by
STMicroelectronics may cause harmful interference and void the user’s authority to
operate this equipment.
This device complies with part 15 of the FCC rules. Operation is subject to the following
two conditions:
1. This device may not cause harmful interference, and
2. This device must accept any interference received, including interference that may
cause undesired operation.
For Class A Digital Devices
This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instruction manual,
may cause harmful interference to radio communications. Operation of this equipment in
a residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
DRAFT
For Class B Digital Devices
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference's by one or more of the following
measures:

Reorient or relocate the receiving antenna.

Increase the separation between the equipment and the receiver.

Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.

Consult the dealer or an experienced radio/TV technician for help.
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4 Formal notices required by the Industry Canada
("IC")
Model: STEVAL-WESU1
IC: 8976C-WESU1
English:
This Class A or B digital apparatus complies with Canadian CS-03.
Changes or modifications not expressly approved by the party responsible for compliance
could void the user’s authority to operate the equipment.
This device complies with Industry Canada licence-exempt RSS standard(s). Operation is
subject to the following two conditions: (1) this device may not cause interference, and (2)
this device must accept any interference, including interference that may cause undesired
operation of the device.
French:
Cet appareil numérique de la classe A ou B est conforme à la norme CS-03 du Canada.
DRAFT
Les changements ou les modifications pas expressément approuvés par la partie
responsable de la conformité ont pu vider l’autorité de l'utilisateur pour actionner
l'équipement.
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils
radio exempts de licence. 'exploitation est autorisée aux deux conditions suivantes: (1)
l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter
tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en
compromettre le fonctionnement.
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5 Board schematic and bill of material
This section contains the bill of material and layout of the STEVAL-WESU1
5.1 Bill of material
BOM STEVAL-WESU1
Item
Q.ty
Reference
Part/Value
2.4 GHz
Micro_USB
_AB
ANT1
23
CN500
C110,C200,C2
16,C401,C411
C111,C112,C1
13,C114,C115,
C116,C201,C2
19,C222,C225,
C228,C302,C3
04,C305,C306,
C307,C308,C3
09,C406,C407,
C412,C504,C5
05
C117,C303,C4
00,C404
C118,C119
1uF
Voltage
/Ampere
/Ohm
Type /
Additional
Notes
Tolerance
Chip Antenna
6.3V
Ceramic X5R
±10%
Package
Manufacturer
Manufacturer Code
SMD
Pulse
W3008C
Molex
47590-0001
Murata
GRM155R60J105KE19D
SMD 0402
DRAFT
100nF
16V
Ceramic X5R
±10%
SMD 0201
Murata
GRM033R61C104KE84D
10uF
6.3V
±20%
SMD 0402
TDK
C1005X5R0J106M050BC
10pF
25V
Ceramic X5R
Ceramic C0G,
NP0
±0.5pF
SMD 0201
TDK
C0603C0G1E100D030BA
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C206
51pF NOT
MOUNT
50V
Ceramic C0G
±10%
SMD 0402
Murata
GRM1555C1H510GA01D
C212,C213
12p
50V
CH
±0.1pF
SMD 0201
Murata
GRM0335C1H120GA01
C214,C221
100p
16V
Ceramic X7R
±10%
SMD 0201
Murata
GRM033R71C101KD01D
10
C223,C224
Not Mount
Not Mount
Not Mount
Not Mount
SMD 0402
Murata
Not Mount
Mandatory
Use
Manuf.Code
Marked
Mandatory
Use
Manuf.Code
Marked
Mandatory
Use
Manuf.Code
Marked
Mandatory
Use
Manuf.Code
Marked
Mandatory
Use
Manuf.Code
Marked
11
C226,C227,
C22,C23
15p
25V
C0G
±0.1pF
SMD 0201
Murata
GJM0336C1E150FB01D
12
C229
150n
6.3V
±10%
SMD 0402
Murata
GRM155R60J154KE01D
13
2.2uF
6.3V
±20%
SMD0402
Murata
GRM155R60J225ME95D
14
C402,C403
C405,C408,C4
09
Ceramic X5R
Ceramic
X5R(EIA)
10nF
10V
Ceramic X7R
±10%
SMD 0201
Murata
GRM033R71A103KA01D
15
C410
220nF
16V
Ceramic X7R
±10%
SMD 0402
Murata
GRM155R71C224KA12D
16
C500
4.7nF
50V
Ceramic X7R
±10%
SMD 0402
Murata
GRM155R71H472KA01D
17
C501
47uF
10V
Ceramic X5R
±20%
SMD 0805
TDK
C2012X5R1A476M125AC
18
D401
RED
LED
VISHAY
VLMS1500-GS08
19
D500
LED
VISHAY
VLMW1500-GS08
20
D501
ST0201
ST
ESDALC6V1-1U2
ST-SUPPLY
21
D502
WHITE
ESDALC6V1
-1U2
ESDA7P601U1M
ST-SUPPLY
DRAFT
QFN
22
J500
SWD/JTAG
THR 1.27
mm 2x5
23
J501
CON3
SMT 3W 1.2
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ESDA&P60-1U1M
SAMTEC
FTSH-105-01-F-D-K
Molex
78171-0003
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mm pitch
24
L203
10uH
25
L204
0R OHM
26
27
28
29
10
30
31
20%
±0,1nH
3.9nH
1.5 Ohm
215 mA
±0,3nH
L205,L206
L401,L402,L40
R113,R309,R4
05,R506
R116,R117,R1
19,R120,R121,
R122,R123,R2
00,R201,R501
R301,R302,R3
03,R307,R308
R114,R118,R3
04,R305,R306
32
33
SMD 0805
Murata
LQM21FN100M70L
SMD 0402
Murata
TBD
SMD 0201
Murata
LQG15HN3N9SO2D
SMD 0201
Murata
BLM03BD471SN1D
±1%
SMD 0201
ANY
ANY
10k
±1%
SMD 0201
ANY
ANY
0-NOT
MOUNT
±1%
SMD 0201
ANY
ANY
±1%
SMD 0201
ANY
ANY
R400
2K
±1%
SMD 0201
ANY
ANY
R401
1R
±1%
SMD 0201
ANY
ANY
34
R402
60 - 0.05W
±1%
SMD 0201
ANY
ANY
35
R403-R408
±1%
SMD 0201
ANY
ANY
36
R404
1K
10K NTC NOT
MOUNT
±1%
SMD 0402
Vishay
NTCS0402E3103FLT
37
R412
1M
±1%
SMD 0201
ANY
ANY
38
R413
33K
±1%
SMD 0201
ANY
ANY
39
R500
1M
±1%
SMD 0201
ANY
ANY
40
R502,R503
100K
±1%
SMD 0201
ANY
ANY
41
R504
100
±1%
SMD 0201
ANY
ANY
42
R505
0.05
±1%
SMD 0402
WELWYN
LRCS0402-0R05FT5
43
SW500
SW
Omron
B3U-3000P
DRAFT
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Mandatory
Use
Manuf.Code
Marked
Mandatory
Use
Manuf.Code
Marked
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44
U201
45
U100
46
U200
47
U202
PUSHBUTT
ON-DPST
U.FL
connector NOT
MOUNT
STM32L15
1VEY6
BLUENRGMS
BALF-NRG01D3
48
U301
LPS25HB
49
U302
LSM6DS3
50
U303
LIS3MDL
51
U400
STNS01
52
U401
53
U402
54
U502
55
Y2, Y201
56
Y101
57
Y202
STC3115
STLQ015XG
30R
USBULC62M6
NX2012SA
32k
EXS00AMU00389
NX2016SA
24MHZ
EXS00ACS05544
NX2016SA
32MHz
EXS00ACS06644
18/22
ST application note template
50 Ohm - 6 Ghz
SMD Coaxial
Connector
SMT
Hirose
U.FL-R-SMT-1(10)
WLCSP104
VFQPN32 5x5
mm
FLIP CHIP 4
ball
HLGA-10L
(2.5 x 2.5x
0.76 mm)
LGA-14L
(2.5x3x0.83
mm)
VFLGA-12
(2.0x2.0x1.0
mm)
DFN12L (3x3
mm)
CSP (1.4 x 2.0
mm)
ST
STM32L151VEY6
ST-SUPPLY
ST
BLUENRG-MSQTR
ST-SUPPLY
ST
BALF-NRG-01D3
ST-SUPPLY
ST
LPS25HB
ST-SUPPLY
ST
LSM6DS3
ST-SUPPLY
ST
LIS3MDL
ST-SUPPLY
ST
STNS01
ST-SUPPLY
ST
STC3115
ST-SUPPLY
SOT666
ST
STLQ015XG30R
ST-SUPPLY
ST
USBULC6-2M6(uQFN)
ST-SUPPLY
DRAFT
uQFN
NDK
NDK
NDK
Version 0.1
STMicroelectronics Confidential
ST application note template
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5.2 Schematic
DRAFT
STMicroelectronics Confidential
Rev 0.1
19/22
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ST application note template
6 Revision history
Table 1: Table Title
Revision
Date of modification
Description of modification
0.2
July 15
Initial draft
0.3
July 15
Modified version
0.4
July 15
Changed name in STEVAL-WESU1
DRAFT
20/22
Version 0.1
STMicroelectronics Confidential
ST application note template
Error! No text of specified style in document.
DRAFT
STMicroelectronics Confidential
Rev 0.1
21/22
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ST application note template
Please Read Carefully:
Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to
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DRAFT
ST and the ST logo are trademarks or registered trademarks of ST in various countries.
Information in this document supersedes and replaces all information previously supplied.
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© 2006 STMicroelectronics - All rights reserved
STMicroelectronics group of companies
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STMicroelectronics Confidential

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