User Manual

UM1765 Ha
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dwa
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iption
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2 Hardware description
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This section describes the X-NUCLEO-IDB04A1 features and provides information which
could be useful for understanding the board schematics.
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2.1 X-NUCLEO-IDB04A1 board
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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.
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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.
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Table 1. Interconnection between STM32 Nucleo board and X-NUCLEO-IDB04A1
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NC
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IOREF
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RESET
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3V3
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5V
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GND
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GND
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VIN
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A0
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A1
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A2
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A3
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A4
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A5
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Left connectors
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1 2 3 4 5 6 7 8
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1 2 3 4 5 6
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3V3
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GND
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GND
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SPI_IRQ
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SPI_CSN*
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D15
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D14
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AREF
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GND
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D13
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D12
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D11
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D10
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D9
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D8
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D7
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D6
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D5
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D4
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D3
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D2
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D1
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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
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GND
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SPI_CLK*
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SPI_MISO
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SPI_MOSI
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SPI_IRQ*
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SPI_MCSN
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BNRG_RST
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SPI_CLK
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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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DocID026346 Rev 4 5/15