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Hardware layout UM1690

16/27 UM1690 Rev 3

connector of the board and a PC. On the PC side, it is required to use the Device Firmware

Upgrade Utility named "DfuSe". This software (STSW-STM32080) and its associated user

manual (UM0412) are available from www.st.com

Several application notes are also available on that topic.

• AN2606: STM32 microcontroller system memory boot mode

• AN3156: USB DFU protocol used in the STM32 bootloader

Note: ST-LINK utilities must not be used when the DFU utility is running.

5.9 Gyroscope MEMS (ST MEMS I3G4250D)

The I3G4250D is an ultra-compact, low-power, three-axis angular rate sensor. It includes a

sensing element and an IC interface able to provide the measured angular rate to the

external world through the I

C/SPI serial interface.

The I3G4250D has dynamically-user-selectable full scales:

• ±245 dps

• ±500 dps

• ±2000 dps

The I3G4250D is capable of measuring rates.

The STM32F072RBT6 MCU controls this motion sensor through the SPI interface.

5.10 JP2 (Idd)

Jumper JP2, labeled Idd, allows the consumption of STM32F072RBT6 to be measured by

removing the jumper and connecting an ammeter.

• Jumper ON: STM32F072RBT6 is powered (default).

• Jumper OFF: an ammeter must be connected to measure the STM32F072RBT6

current, (if there is no ammeter, the STM32F072RBT6 is not powered).

5.11 Extension and RF EEPROM connector

This connector is able to accept an extension board or the RF EEPROM board ANT7-

M24LR-A (see application note How to design an antenna for dynamic NFC tags (AN2972)

for more details).

Figure 7. Extension and RF EEPROM connector

ST STM32F072 User Manual

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