Ucpd; Usb Type-C ® Receptacles; Power Delivery And Local Power Management; Vbus Management And Discharge Mechanism - ST STM32G474E-EVAL User Manual

Hardware layout and configuration
CN20
terminal
6
7
8
Note: The bidirectional voltage translator is implemented on the SPI MOSI signal between the
STM32G474QET6 and LCD. It supports the 3-wire serial interface of the LCD panel that
only handles a 3-wire SPI port. MFX_GPIO13 controls the direction of this voltage translator
(the I/O PB15 is working as MOSI when MFX_GPIO13 is high or as MISO when
MFX_GPIO13 is LOW).
5.23

UCPD

5.23.1 USB Type-C
The CN22 USB Type-C
can be used as a DRP (dual-role port), which is eligible to supply another platform plugged
by a USB Type-C
in the case of Consumer configuration.
The STM32G474E-EVAL board also supports USB 2.0-compliant full-speed communication
via the CN22 USB Type-C
5.23.2

Power Delivery and local power management

The STM32G474E-EVAL board has its external power jack (CN25, 5 to 18 V input) with an
internal DC/DC regulator to support the power Delivery function and to provide up to 5.2 V /
3 A on the CN22 USB Type-C
5.23.3 V management and discharge mechanism
BUS
The CN22 USB Type-C
managed for supplying other platforms as a Provider or to be supplied as a Consumer. Two
MOSFETs Q2 and Q3 are set in the back-to-back configuration to protect and isolate the
V supplying path in both directions.
BUS
If the CN22 acts as Provider, the V
(Q2 and Q3) driven by the STM32G474QET6 (GPIO, PC11). For the Consumer case, the
same V
BUS
switch.
Moreover, the V
by the MOSFET T9 and an RC filter controlled by PB2.
40/66
Table 21. CN20 and CN24 TFT LCD connectors (continued)
Terminal
name
- RD -
- SDO PB14
- RESET RESET#
® receptacles
®
certified receptacle is present on the STM32G474E-EVAL board. It
®
cable when they are configured as Provider or, otherwise, to be supplied
®
receptacle.
®
receptacle. Refer to
®
receptacle can be used as a DRP (dual-role port). Its V
path is managed by PC11 of the STM32G474QET6 enabling the discrete load
path on the receptacle presents a discharge mechanism implemented
BUS
UM2514 Rev 5
CN24
MCU port
terminal
6
7
8
Table 5
is on the supply path through the discrete load switch
BUS
Terminal
Power port
name
BL_Control 5 V or 3.3 V
BL_GND GND
BL_GND GND
for the JP12 setting selection.
BUS
UM2514
can be