UM2191
System
architecture
DocID030479 Rev 2
35/55
2.3.9
P-NUCLEO-USB002 expansion board: connectors
2.3.9.1
VBUS load connectors
Connectors CN11 and CN12 for port 0 and port 1 are able to supply V
BUS
externally to
power any load connected to them.
2.3.9.2
Extension Connectors
Both ports support the USB PD and the USB Type-
C™ specification, including the
alternate-mode capability. For this reason, connectors CN13 and CN14 for port 0 and port
1 are available to expose all the main pins and facilitate the design of applications using
this mode.
Figure 30: P-NUCLEO-USB002: CN13 and C14 connector pinout
2.3.9.3
Power connector
The P-NUCLEO-USB002 power connector CN4 on the rear of the board connects the
expansion board to a selectable power supply with appropriate voltage and current couples
for the USB PD specification.
The pairs 1 and 3 as well as 2 and 4 can externally supply the V
BUS
management circuits
from a power board to the two Type-
C™ receptacles CN0 and CN1.
Pairs 9 and 11 as well as 10 and 12 can select the external power requested by the
application. In particular, the default GPIO functionality assigned to pins 9 and 11 can be
changed to I²C SDA and I²C SCL respectively if the external power board acts as smart
power supply.
Enable and discharge pairs 13 and 15 as well as 14 and 16 can control any external power
supply board load switches available. A pair of POWER GOOD pins check whether the
power supply is ready to provide the requested power range.
Power connector CN4 is also able to provide the V
CONN
voltage if the external power supply
board supports that functionality.
Finally, the V
SYS
system supply voltage be the voltage input for the embedded DC-DC
converter.