DocID025151 Rev 2
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UM1668
Hardware layout and configuration
69
2.10 MicroSD
Card
A 2 GB (or more) MicroSD Card can be connected to the STM32F439NIH6 SDIO port.
MicroSD Card detection is managed by I/O expander GPIO15.
2.11 RF-EEPROM
An RF-EEPROM daughterboard ANT7-M24LR-A is mounted on CN3 of the
STM32439I-EVAL board via the I2C1 bus. The RF-EEPROM can be accessed by the
microcontroller via the I2C1 bus or by radio frequency (RF) using a 13.56 MHz reader
(for example, CR95HF).
The I2C address of RF-EEPROM is 0b1010000.
2.12 CAN
The STM32439I-EVAL evaluation board supports one channel of CAN2.0A/B complaint
CAN bus communication based on 3.3 V CAN transceiver.
High-speed mode, standby mode and slope control mode are available and are selected by
setting JP10.
Table 9. CAN related jumpers
Jumper Description
JP10
CAN transceiver is working in standby mode when JP10 is set as shown to
the right:
CAN transceiver is working in high-speed mode when JP10 is set as shown to
the right: (default setting)
CAN transceiver is working in slope control mode when JP10 is open.
JP11
CAN terminal resistor is enabled when JP11 is fitted.
Default setting: Not fitted
JP16
PA11 is only connected with USB FS1 DM signal when JP16 is fitted. (default setting)
PA11 is connected with CAN RX signal when JP16 is fitted.
If the CAN function is being used, USB connector CN14 should be disconnected to leave
USB FS1_DM signal floating.
1 2 3
1 2 3
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