12.2
USB Type-C
®
(High Speed, sink only)
The STM32U5A9J-DK product supports a USB HS 2.0 interface on the USB Type-C
®
receptacle connector
(CN4). The STM32U5A9J-DK product offers compatibility with USB Type-C
®
Rev 1.3 and is configured by default
to behave as a self-powered USB device (when JP4 is on STLK).
Caution:
As required by the USB Type-C
®
specification, the STM32U5A9J-DK product can interface on CN4 with USB2.0
and USB3.x Legacy Hosts supporting USB high‑speed data link, but with these restrictions:
• JP4 must not be set on USBC (to respect the 100 mA maximum current before enumeration), or
• JP4 might be set on USBC, but the source must be 500 mA current capable (USB2.0 charging port for
example)
Caution:
The total drawn current on CN4 USB Type-C
®
VBUS must not exceed 3 A in any application. When using CN4
to power the STM32U5A9J-DK, check USB VBUS voltage constraints are compatible with your 5 V-powered
application on Expansion connector CN9 (refer to USB Type-C
®
Current load line).
Warning:
The STM32U5A9J-DK supports only a 5 V nominal voltage VBUS on USB Type-C
®
CN4 connector. Do not set VBUS at higher or lower nominal voltages than 5 V. Using
out
‑
of
‑
range nominal voltage VBUS might result in board malfunction.
The USB Type-C
®
connector (CN4) can be used to demonstrate different features of STM32U5A9J-DK.
1. Power the Discovery board with a 5 V V
BUS
with a current up to 3 A
2. High‑speed data transfers with any USB Host
12.2.1
USB Type-C
®
sink only
Even if STM32U5A9J-DK is configured by default to behave as a self-powered USB device powered by USB
STLK CN5, the CN4 USB Type-C
®
connector can power the Discovery board with a 5 V power coming from any
USB Type-C
®
connected source (refer to Section 9.1 Power diagram) with the following constraints:
• A jumper must be set on the USBC position of the JP4 header (5V source selection, to behave as a USB
Powered device).
• As per the USB Type-C
®
specification, V
BUS
is in the range of 5 V +10%/-5% and default sourcing current
is 500 mA minimum while UCPD.DBn control pin (PE9) is an input (default state).
• Sinking up to 1.5 A or up to 3 A from a USB Type-C
®
Source requires:
– To set UCPD.DBn control pin (PE9) at a high level to be able to monitor CCx lines on UCPD.ADC1
(PG0)/UCPD.ADC2 (PF15) for host capability identification
– To check whether V
BUS
voltage constraints are compatible with any 5 V-powered application on
expansion connector CN9 (refer to USB Type-C
®
Current load lines and check the 7V maximum
overvoltage V
BUS
protection is fitting your need).
The TCPP01-M12, associated with a power switch, is used to protect STM32U5A9J-DK from ESD and USB V
BUS
over-voltage (6.5 V typical, up to 7 V).
UM2967
USB Type-C® (High Speed, sink only)
UM2967 - Rev 1
page 29/68
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