Emcraft Systems
4.2. Jumpers
The following jumpers must be configured on the SOM-BSB-EXT board:
Jumper
Configuration
Notes
JP1
1-2 closed, 3-4 open
Enable power on the STM SOM (VCC3)
JP3
1-3 open, 2-4 closed
Use the mini-USB port as the power source
4.3. Board Connections
To power the SOM-BSB-EXT baseboard with the STM32F4 SOM up, simply connect it to a PC
/ notebook by plugging a mini-USB cable into the P1 mini-USB connector on the SOM-BSB-
EXT board. As soon as the connection to the PC has been made, the LED
DS2
should lit up,
indicating that the board is up and running.
A single USB connection provides a 500 mA power to the STM32F4 SOM, which is sufficient
for basic functionality. Note however that some advanced operations, such as
WiFi
connectivity using the USB
WiFi
module, may require more than 500 mA for reliable
operation. Use the second link of the mini-USB Y-cable to connect to the PC for such
configurations.
On the PC side, the USB link provides a serial console device to the STM32F4 SOM. The
software installed on the board is configured for a 115.2 K terminal. On the Linux host, the
serial console is available using a
/dev/ttyUSB
n
device.
To provide network connectivity to the board, connect it into your LAN by plugging a
standard Ethernet cable into the J1 connector. The board is pre-configured with an IP
address of 192.168.0.2.
Breadboard area
USB Power &
UART interface
Reset button
ULPI USB PHY
User button
USB OTG interface
SOM-BSB-EXT baseboard
STM32F4 SOM
STM32F427
16MB NOR Flash
Ethernet PHY
ARM JTAG interface
32MB SDRAM
Emcraft Systems STM32F4 SOM Starter Kit Guide
7/12
Release 1.12.0