ST STM32F401

DocID025174 Rev 1 11/39
UM1669 Hardware layout
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Figure 3. Bottom layout
MS32362V1
SB3, SB5, SB7, SB9
(DEFAULT)
SB10, SB11 (RX, TX)
SB2, SB4, SB6, SB8
(RESERVED)
SB15 (SWO)
SB16 (X2 crystal)
SB17 (X3 crystal)
SB18 (X3 crystal)
SB19 (BOOT0)
SB12 (STM_RST)
SB14 (X2 crystal)
SB13 (NRST)
SB20 (BOOT1)
SB21 (B1-USER)