ST STM32 User Manual page 30

Hardware layout and configuration
Bridge
SB111 (NRST)
SB113, SB114 (IOREF)
SB116 (SDMMC_D0),
SB117 (SDMMC_D1)
SB120, SB119 (LD1-LED)
SB139 (LD2-LED)
SB118 (LD3-LED)
SB121, SB122 (D11)
SB144,145
(X2 crystal)
SB148 (PF0/PH0), SB163
(PF1/PH1) (Main clock)
SB112, SB149 (MCO)
SB8, SB9 (external 8M
crystal)
30/85
Table 12. Solder bridges (continued)
(1)
State
Board RESET signal (NRST) is connected to ST-LINK reset control I/O
ON
(T_NRST).
Board RESET signal (NRST) is not connected to ST-LINK reset control
OFF
I/O (T_NRST).
OFF, ON IOREF is connected to +3.3 V.
ON, OFF IOREF is connected to +3.3V_PER.
ON These pins are connected to ST morpho connector CN12.
These pins are disconnected from ST morpho connector CN12 to avoid
OFF
stub of SDMMC data signals on PCB.
ON, OFF Green user LED LD1 is connected to PB0.
OFF,ON Green user LED LD1 is connected to D13 of ARDUINO
OFF, OFF Green user LED LD1 is not connected.
ON,ON Forbidden
ON Blue user LED LD2 is connected to PB7.
OFF Blue user LED LD2 is not connected.
ON Red user LED LD3 is connected to PB14.
OFF Red user LED LD3 is not connected.
D11 (Pin 14 of CN7) is connected to STM32 PA7
ON, OFF
(SPI_A_MOSI/TIM_E_PWM1).
D11 (Pin 14 of CN7) is connected to STM32 PB5
OFF,ON
(SPI_A_MOSI/TIM_D_PWM2).
PC14, PC15 are not connected to ST morpho connector CN11.
OFF
(X2 used to generate 32KHz clock).
PC14, PC15 are connected to ST morpho connector CN11.
ON
(R37 and R38 must be removed).
PF0/PH0 is not connected to ST morpho
OFF, ON PF1/PH1 is connected to ST morpho connector CN11
(MCO is used as main clock for STM32 on PF0/PH0).
PF0/PH0, PF1/PH1 are not connected to ST morpho connector CN11
OFF, OFF
(X3, C37, C38, SB8 and SB9 provide a clock. In this case SB149 must be
removed).
PF0/PH0 and PF1/PH1 are connected to ST morpho connector CN11.
ON, ON
(SB8, SB9 and SB149 must be removed).
MCO of ST-LINK (STM32F103CBT6) is connected to PF0/PH0 of
ON
STM32.
MCO of ST-LINK (STM32F103CBT6) is not connected to PF0/PH0 of
OFF
STM32.
OFF PF0/PH0 and PF1/PH1 are not connected to external 8 MHz crystal X3.
ON PF0/PH0 and PF1/PH1 are connected to external 8 MHz crystal X3.
UM1974 Rev 9
Description
UM1974
®
signal (PA5).