ST STM32F3DISCOVERY, Руководство пользователя

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Hardware and layout UM1570
20/36 Doc ID 023594 Rev 2
4.11 Solder bridges
Table 5. Solder bridges
Bridge State
(1)
Description
SB17,18
(X1 crystal)
(2)
OFF X1, C22, C23, R32 and R33 provide a clock. PF0, PF1 are disconnected from P2.
ON PF0, PF1 are connected to P2 (R32 and R33 must not be fitted).
SB1,3,5,8 (default) ON Reserved, do not modify
SB2,4,6,9 (reserved) OFF Reserved, do not modify
SB14,16
(X3 crystal)
OFF
X3, C14, C26, R29 and R30 deliver a 32 KHz clock. PC14, PC15 are not
connected to P2.
ON PC14, PC15 are only connected to P2. Remove only R26, R29
SB23
(B2-RESET)
ON B2 Push Button is connected to NRST of STM32F303VCT6
OFF B2 Push Button is not connected to NRST of STM32F303VCT6
SB20
(B1-USER)
ON B1 Push Button is connected to PA0
OFF B1 Push Button is not connected to PA0
SB13,15
(RX,TX)
OFF Reserved, do not modify
ON Reserved, do not modify
SB7
(NRST)
ON NRST signal of connector CN3 is connected to NRST of STM32F303VCT6
OFF NRST signal is not connected
SB10
(SWO)
ON SWO signal of connector CN3 is connected to PB3
OFF SWO signal is not connected
SB11
(STM_RST)
OFF No incidence on NRST signal of STM32F103C8T6
ON NRST signal of STM32F103C8T6 is connected to GND
SB19
(BOOT0)
ON BOOT0 signal of STM32F303VCT6 is at level "0" through 510 ohm pull-down
OFF
BOOT0 signal of STM32F303VCT6 is at level "1" through 10K ohm pull-up (not
provided).
SB21,22
(USB USER)
OFF
PA11 and PA12 are only used for USB USER and not connected to P2 to avoid
noise.
ON PA11 and PA12 are connected to P2.
SB12
(MCO)
(2)
OFF MCO signal of STM32F103C8T6 is not used.
ON
MCO clock signal from STM32F103C8T6 is connected to OSC_IN of
STM32F303VCT6.
1. Default state is shown in bold.
2. If SB12 is ON, SB17 must be OFF and R33 removed to provide the clock source from the MCO correctly.