Figure 2. STLINK-V3PWR connections
DT59112V1
DEBUG
POWER
BRIDGE
LEDs
USB-C
Note: USB-C, DEBUG, BRIDGE, POWER connectors, and LED terminologies used in this document are referring to
the naming defined in Figure 2.
5.3 USB connection with a host PC
5.3.1 Pre‑requisite
The STLINK-V3PWR’s USB-C must be connected to a USB Type-A host PC or hub port supporting charging
(having a “spark” logo) or to a
USB Type-C
®
host PC or hub port. Refer to Table 4 for details.
The USB LED indicates if STLINK-V3PWR is connected to a USB port supporting charging:
• USB LED in green color: The USB host port supports charging and the STLINK-V3PWR SMU (OUT) and
auxiliary output (AUX) are enabled.
• USB LED in orange color: The USB host port does not support charging and the STLINK-V3PWR SMU
(OUT) and auxiliary output (AUX) are disabled.
Note: The debugger and bridges interfaces are always functional even if the STLINK-V3PWR’s USB-C is connected
onto a standard USB HS (high
‑
speed) host port.
5.3.2 Detailed description
For the data interface, the STLINK-V3PWR’s USB-C must be connected to a USB HS host port. USB FS (full
speed) or USB LS (low speed) modes are not supported. Connecting
STLINK-V3PWR to a USB SS (super
speed) host port is also possible as the USB SS port runs in HS mode.
For the power, the STLINK-V3PWR internal circuitry, including the SMU output (OUT), and the auxiliary output
(AUX) are powered by USB-C. Accordingly, the host PC must be capable to supply them, especially for the SMU
output (OUT) and the auxiliary output (AUX) that can require a significant peak of energy to power supply a
complete target application.
STLINK-V3PWR automatically detects the power budget advertised by the host PC USB port. As mentioned in
Section 5.3.1, the STLINK-V3PWR’s USB-C must be connected to a USB host PC or USB hub port that can
provide 5 V/1.5 A minimum, typically a USB host port supporting charging. Refer to Table 4 for details.
UM3097
USB connection with a host PC
UM3097 - Rev 1
page 7/30
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