OLIMEX STM32-E407, Руководство пользователя

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OLIMEX© 2018 STM32-E407 user's manual
6.12.2 B1_1/B1_0 and B0_1/B0_0
These two PTH jumpers set where the board should boot from. B1_1/B1_0 and B0_1/B0_0 are
PTH jumpers and their position can be changed relatively easy. The board can try to boot from
three places and that depends on the position of the B1_1/B1_0 and B0_1/B0_0 – User Flash
Memory, System Memory or the Embedded SRAM.
Notice that these two jumpers must be moved together – they are responsible for the boot mode if
bootloader is present.
The DFU bootloader is found on USB_OTG1.
If B0_0 is closed the board will try to boot from User Flash Memory.
If B0_1 is closed there are two variants depending on the state of B1_1/B1_0 jumper – if B0_1 is
closed and B1_0 is closed the board will try to boot from System Memory. If B0_1 is closed and
B1_1 is closed bootloader must be located in the Embedded SRAM.
The default positions are B0_0 and B1_0 (Boot from User Flash Memory).
6.12.3 R-T
This is SMD type jumper.
If you close/solder this jumper RST and TRST at the JTAG will be connected.
The default position is open/unsoldered.
6.12.4 3.3V_E
This is SMD type jumper.
Board digital power will be disabled if open/unsoldered
The default position is closed.
6.12.5 AGND_E
This is SMD type jumper.
If open/unsoldered will disable analog ground.
The default position is closed.
6.12.6 AREF_EN
This is SMD type jumper. If open/unsoldered will disable ADC reference.
The default position is closed.
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