JUMPER DESCRIPTION
STM32-P107 has a number of jumpers. They control the behavior of the board and allow modification of
the default hardware connections. There are two types of jumpers – PTH ones (big ones, easy to change
using a plastic cap) and SMT ones (pads that require cutting and soldering). It is safe to change the
position of the PTH jumpers as long as you use one of the legal positions of the jumper. Changing the
SMT jumpers, on the other hand, is not recommended – misconfiguration of the SMT jumpers might
damage the board.
There are jumper tables printed at the back of the board!
PTH jumpers:
B0_0/B0_1 and B1_0/B1_1 control the boot mode.
B0_0/B0_1
When this jumper is in position B0_1 – BOOT0 is connected to 3.3V, and when the
jumper is in position B0_0 – BOOT0 is connected to GND.
Default state is B0_0.
B1_0/B1_1
When this jumper is in position B1_1 – BOOT1 is connected to 3.3V, and when the
jumper is in position B1_0 – BOOT1 is connected to GND.
Default state is B1_0.
VBUS, USB_D+, and USB_D- are responsible for the USB host control. The host can be
routed to either the USB_OTG or the USB_HOST control.
VBUS
When is in position “H” - co5V_HOST_PWR to OTG_VBUS.
When is in position “O” - co5V_OTG_PWR to OTG_VBUS.
Default state is “O”.
USB_D+
When is in position “H” - connects USB to OTG_DP.
When is in position “O” - connects US to OTG_DP.
Default state is “O”.
USB_D-
When is in position “H” - connects USD_HOST_D- to OTG_DM.
When is in position “O” - connects USB_OTG_D- to OTG_DM.
Default state is “O”.
RST_E and BOOT0_E jumpers are responsible for the system memory boot mode via UART
protocol.
RST_E, BOOT0_E jumpers
Note that it is recommended to move those jumpers together – either both should be
open or both should be closed.
When both are closed RS232 boot is enabled (and also B0_0/B0_1 should be in B0/1
position). You can use Flash Load Demonstrator program provided for free by
STMicroelectronics:
http://www.st.com/web/en/catalog/tools/PF257525
Default states are RST_E – open; BOOT_E – open.
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