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
2
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