UM2191
System
architecture
DocID030479 Rev 2
29/55
Figure 23: P-NUCLEO-USB002 expansion board: JP000 and JP001 jumper settings to provide
VCONN through the local voltage regulator
The V
CONN
voltage is only applied to the CC pin that is not connected to the CC wire after:
the device is configured in source power role or dual role power (DRP)
V
CONN
power switches are enabled
a valid connection to a sink is achieved
Ra is detected on the unwired CC pin
a valid power source is applied on the VCONN pin with respect to a pre-defined UVLO
threshold.
V
CONN
discharge is automatically managed by STUSB1602.
V
CONN
protections can be configured via a dedicated control register (see STUSB1602
datasheet on
www.st.com
).