dm00258098

DN0035
Design note
G-Module Motherboard
Designs from our labs describe tested circuit designs from ST labs which provide optimized solutions
for specific applications. For more information or support, visit www.st.com
By Sergio Rossi
Main components
BlueNRG-MS CSP
Bluetooth Low Energy Network Processor
BALF-NRG-01D3
50 Ω nominal input / conjugate match balun to BlueNRG
STM32F411CEY
High-performance, ARM Cortex-M4 core with DSP and FPU
LSM6DS3
iNEMO inertial module: 3D accelerometer and 3D gyroscope
LIS3MDLTR
Ultra low-power, high performance 3-axis magnetometer
UVIS25
Digital UV Index sensor: 0 - 15 UV Index output range
LPS25HBTR
MEMS pressure sensor: 260-1260 hPa absolute digital output
LD39115J25R
150 mA low quiescent current low noise voltage regulator
STC4054GR
Li-Ion Battery charger with thermal regulation
Specification

USB or battery powered MEMS module

G-Module, 13.5 mm x 13.5 mm size

G-Module Motherboard, 30mm x 15 mm size
Circuit description
The G-Module Motherboard was designed to use with the G-Module in place of the Gmodule Cradle in order to reduce space and maintain the cradle board’s functionality and
capability (see Figure 1). The G-Module motherboard’s reduced dimension (see Figure 2)
allows using it inside a small housing for wearable applications.
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The G-Module is soldered onto the Motherboard instead the cradle board, so it can be
easily removed (i.e. socket approach).
Figure 1. G-Module Cradle
Figure 2. G-Module Motherboard
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Figure 3. G-Module Motherboard circuit diagram
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Functional Overview, Top and Bottom side
Figure 4. G-Motherboard Top side
Figure 5. G-Motherboard Bottom side
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G-Module Motherboard programming guide
To program the G-Motherboard, it is necessary to have the followings hardware:
1. ST Link/V2
2. JTAG to SWD adapter (i.e. Olimex ARM-JATG-20-10)
3. SWD cable
4. Micro USB cable. (To connect the G-Motherboard to the PC)
5. Mini USB cable. (To connect STLink/V2 to the PC)
Figure 6. G-Module Programming
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To program the G-Motherboard, it is recommended to use the following software:

STSW-LINK004 “STM32 ST-LINK utility”
Use this software to program the G-Module Motherboard if you already have the
.bin or .hex file available

Software Development Kit (Atollic TrueSTUDIO, IAR Embedded Workbench and
SystemWorkbench for STM32)
Use this solution if you have the source and/or the full project code
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Bill of Material
NAME
Manufacturer P/N
Device
Package
D1
STMicroelectronics
BAT60JFILM
SOD323
U2
STMicroelectronics
STC4054GR
SOT23-5L
U1
STMicroelectronics
G-Module
Custom module
CONN HEADER 10POS
N/A
U9
FCI 20021111-00010T4LF
UNSHD VERT T/H
C1
Johanson Dielectrics Inc.
160R07Y104ZV4T
CAP CER 0.1UF 16V Y5V
R2
Panasonic Electronic
L1
L2
USB1
U11
Ext Battery
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0402
RES SMD 22K OHM 5% 1/5W
Components
ERJ-PA2J223X
R1, R3
0402
Panasonic Electronic
Components
ERJ-2GEJ471X
Panasonic Electronic
Components
LNJ447W84RA1
Panasonic Electronic
Components
LNJ347W83RA
RES SMD 470 OHM 5%
1/10W
LED AMBER RECTANGLE
LED GREEN RECTANGLE
0402
0402
0402
Global Connector
Technology
USB3075-30-A
USB3075-30-A MICRO USB,
N/A
2.0 TYPE B, RECETPACLE,
SMT
EAO
09.03201.02
EAO 09.03201.02 SWITCH,
SLIDE, SPDT-CO, 500mA,
THOUGH HOLE
ICP501421PS
Battery Packs 3.7V 115mAh
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N/A
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Support material
Related design support material
Product/ system Evaluation board (G-Module, Programming Cradle and SWD to JTAG
adapter)
Software Development Kit (containing examples and source code for Atollic TrueSTUDIO, IAR
Embedded Workbench and SystemWorkbench for STM32)
Gerber files (on request Eagle file can be provided)
PCB layout, bill of materials and schematics files
Documentation
Design Note: G-Module An Inertial and Environmental Sensor Module for IoT
Revision history
Date
23-Jan-2015
December 2015
Version
1
Changes
Initial release
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