ST Microelectronics S R L IDB04A1 Bluetooth Low energy expansion board based on BlueNRG for STM32 Nucleo User Manual UM1765
ST Microelectronics S.R.L. Bluetooth Low energy expansion board based on BlueNRG for STM32 Nucleo UM1765
Manual

UM1765 
User 
manual
Bluetooth low energy expansion 
board 
based on BlueNRG for STM32 
Nucleo
Introduction 
This document provides detailed hardware requirements and board connections for the X- 
NUCLEO-IDB04A1 Bluetooth
® 
low energy (BLE) evaluation board based on BlueNRG for 
STM32 Nucleo. This board is part of STMicroelectronics’ offering of evaluation boards 
designed around the BlueNRG Bluetooth low energy wireless network processor. 
The excellent performance of BlueNRG and the best matching between BlueNRG and 
BALF-NRG, X-NUCLEO-IDB04A1 passed the RF TEST for Japan Radio Law certification 
with higher margin above the specification values as well as it is FCC certified (FCC ID: 
S9NIDB04A1). 
Figure 1. X-NUCLEO-IDB04A1 evaluation board 
Other BlueNRG evaluation boards are available in the following kits: 
STEVAL-IDB002V1: BlueNRG development platform 
STEVAL-IDB003V1: BlueNRG USB dongle 
April 2015  DocID026346 Rev 4  1/15 
www.st.com

Contents UM1765
Contents 
1  Board Description and Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . 3 
1.1  Hardware requirements  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3 
1.2  System requirements  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4 
2  Hardware description  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 
2.1  X-NUCLEO-IDB04A1 board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  5 
2.1.1  Current measurements  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 
3  Formal Notices Required by the U.S. Federal 
Communications Commission (“FCC”)   . . . . . . . . . . . . . . . . . . . . . . . . . 7 
4 Operational description and block diagram . . . . . . . . . . . . . . . . . . . . . . 8 
5  List of acronyms  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 
6  Board schematic and bill of material . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 
7  Revision history   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 
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UM1765 Getting sta
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1  Board Description and Getting started 
TheX‐NUCLEO‐IDB04A1isaBluetoothlowenergyevaluationboardtoallowexpansionofthe
STM32Nucleoboards.ItiscompatiblewiththeArduinoUNOR3connectorlayout,andisdesigned
aroundBlueNRG,aBluetoothlowenergy,lowpowernetworkcoprocessorcompliantwithBTLE
4.0andtheBALF‐NRG‐01D3,anultra‐miniaturebalunoptimizedforSTBlueNRGRFIC,which
integratesmatchingnetworkandharmonicsfilter.TheX‐NUCLEO‐IDB04A1interfaceswiththe
STM32MCUviaSPIpin,andtheusercanchangethedefaultSPIclock,theSPIchipselectandSPI
IRQbychangingoneresistorontheevaluationboard.TheexcellentperformanceofBlueNRGand
thebestmatchingbetweenBlueNRGandBALF‐NRG,X‐NUCLEO‐IDB04A1passedtheRFTESTfor
JapanRadioLawcertificationwithhighermarginabovethespecificationvaluesaswellasitisFCC
certified(FCCID:S9NIDB04A1).
Key features: 
 BlueNRGlowpower,lowenergyBluetoothnetworkcoprocessor
 BALF‐NRG‐01D3balun&harmonicfilter
 FreecomprehensivedevelopmentfirmwarelibraryandexampleforBlueNRG,
compatiblewithSTM32Cubefirmware
 Bluetoothlowenergy4.0masterandslavecompliant
 CompatiblewithSTM32Nucleoboards
 EquippedwithArduinoUNOR3connector
 Verylowpowerconsumption:7.3mARXand8.3mATXat+0dBm
 Maximumtransmissionpower:+8dBm
 Excellentreceiversensitivity(‐88dBm)
 X‐NUCLEO‐IDB04A1isofficiallycertificatedasaBTLE5mWmoduleforJapanRadio
Law“TYPE”CertificationbyJapangovernment.
 X‐NUCLEO‐IDB04A1isFCCcertified(FCCID:S9NIDB04A1)
 RoHScompliant
Figure 1 - Functional Block Diagram 
This section describes the hardware requirements for the X-NUCLEO-IDB04A1 evaluation 
board.   

UM1765 Getting sta
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1.1 Hardware requirements 
The 
X-NUCLEO-IDB04A1 
is an expansion board for use with STM32 Nucleo boards (please 
refer to UM1724 on www.st.com for further information). To function correctly, the STM32 
Nucleo board must be connected to the X-NUCLEO-IDB04A1 board as shown in Figure 2 
below. 
Figure 2. X-NUCLEO-IDB04A1 plugged to STM32 Nucleo 
board
The interconnection between the STM32 Nucleo and the X-NUCLEO-IDB04A1 has been 
designed to permit the use of any STM32 Nucleo board, although the optimal combination is 
obtained using the NUCLEO-L152RE or NUCLEO-L053R8 hosting the ultra-low power 
STM32. 
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1.2 System requirements 
Using the Nucleo boards with the X-NUCLEO-IDB04A1 expansion board requires the 
following software and hardware: 
a Windows PC (XP, Vista, 7, 8) to install the software package 
a USB type A to Mini-B USB cable to connect the Nucleo to the PC 
Installation of the board firmware package (order code: X-CUBE-BLE1) and the BlueNRG 
graphical user interface utility on the user’s PC requires the following: 
At least 128 MB of RAM 
40 MB of hard disk space available 
The X-CUBE-BLE1 firmware and related documentation is available on www.st.com. 
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UM1765 Ha
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2 Hardware description 
This section describes the X-NUCLEO-IDB04A1 features and provides information which 
could be useful for understanding the board schematics. 
2.1 X-NUCLEO-IDB04A1 board 
The board allows the user to test the functionality of the BlueNRG processor. It hosts the 
innovative BALF-NRG-01D3 balun & harmonic filter and its functionality can be exploited 
using the firmware package contained in the X-CUBE-BLE1. It is fundamental to program 
the microcontroller on the STM32 Nucleo board. Please refer to user manuals UM1724 and 
UM1725, available on www.st.com. 
The BlueNRG processor and the STM32 Nucleo board are connected through connectors 
CN5, CN6, CN8 and CN9 (see Table 1 for details). The pins indicated with an asterisk (*) 
represent an alternative pin for that specific function, i.e. SPI_IRQ could be moved from 
CN8.1 to CN5.2. 
Table 1. Interconnection between STM32 Nucleo board and X-NUCLEO-IDB04A1 
NC 
IOREF 
RESET 
3V3 
5V 
GND 
GND 
VIN 
A0 
A1 
A2 
A3 
A4 
A5 
Left 
connectors
1
2
3
4
5
6
7
8
 
1
2
3
4
5
6
 
3V3 
GND 
GND 
SPI_IRQ 
SPI_CSN* 
D15 
D14 
AREF 
GND 
D13 
D12 
D11 
D10 
D9 
D8 
D7 
D6 
D5 
D4 
D3 
D2 
D1 
D0 
Right 
connectors
CN5 
digital
 CN9 
digital
10 9 8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1 
GND 
SPI_CLK* 
SPI_MISO 
SPI_MOSI 
SPI_IRQ* 
SPI_MCSN 
BNRG_RST 
SPI_CLK 
To change the default pin SPI_CLK, SPI_IRQ and SPI_CSN the user must disassemble, 
respectively,R10, R12 and R15, and assemble R11, R16 and R13. 
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The board also includes: 
–  a high frequency 16 MHz crystal 
–  a low frequency 32 kHz crystal for lowest power consumption 
– a BALF-NRG-01D3 balun & harmonic filter 
–  an EEPROM M95640-RMN6P to store the board parameters 
Not mounted: 
–  a JTAG connector to program the BlueNRG processor 
–  an SMA connector for the external antenna 
2.1.1 Current measurements 
To monitor the power consumption of entire BlueNRG X-NUCLEO-IDB04A1 board, jumper 
U5 can be used, inserting an ammeter probe between pins 1 and 2 of the connector. Since 
the power consumption of BlueNRG during most of its operating time is very low, an 
accurate instrument in the range of few uA  may be required. 
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UM1765 Fo
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mal Notices Requi
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3  Formal Notices Required by the U.S. Federal 
Communications Commission (“FCC”) 
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 any interference that may cause undesired 
operation. 
This device uses, generates and radiated radio frequency energy. The radio frequency 
energy produced by this device is well below the maximum exposure allows by Federal 
Communications Commission (FCC). 
The X-NUCLEO-IDB04A1 is FCC certified (FCC ID: S9NIDB04A1). 
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 by one or more of the following 
measures: 
-- Reorient or relocate the receiving antenna. 
-- Increase the separation between the equipment and 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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7 Revision history 
Table 5. Document revision history 
Date
 Revision 
Changes
16-May-2014 
1
 Initial release. 
21-Jan-2015 
2
 Modified: 
- Table 3 and Table 4. 
19-Feb-2015 
3
Modified: 
- order code from STSW-IDB04V1 to X-CUBE-BLE1 
Section 1.2 and Section 2.1. 
13-Apr-2015 
4
 Updated: 
- Part number item 27 Table 4. 
22-Apr-2015 
5
 FCC 
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UM1765 
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DocID026346 Rev 4  15/15