ST NUCLEO-H755ZI-Q User Manual

UM2408 Rev 2 29/51
UM2408 Hardware layout and configuration
50
6.11 USB OTG FS or device
The STM32H7 Nucleo-144 board supports USB OTG or device-full-speed communication
via a USB Micro-AB connector (CN13) and USB power switch (U18) connected to V
BUS
.
Warning: USB Micro–AB connector (CN13) cannot power the Nucleo-
144 board. To avoid damaging the STM32, it is mandatory to
power the Nucleo-144 before connecting a USB cable on
CN13. Otherwise, there is a risk of current injection on
STM32H7 I/Os.
A green LED LD8 lights in one of these cases:
• Power switch (U18) is ON and the STM32H7 Nucleo-144 board works as a USB host.
• V
BUS
is powered by another USB host when the STM32H7 Nucleo-144 board works as
a USB device.
The red LED LD7 lights if overcurrent occurs when 5 V is enabled on V
BUS
in USB host
mode.
Note: 1.It is recommended to power the Nucleo-144 board by an external power supply when
using USB OTG or host function.
ESD protection part USBLC6-2SC6 is implemented on USB port because all USB pins on
STM32H7 are dedicated to USB port only on the STM32H7 Nucleo-144 board. USB pin ID
is not used.
Table 13. USB pin configuration
Pin
name
Function
Configuration when using USB
connector
(1)
Configuration when using ST
morpho connector
Remark
PA8 USB SOF - -
Test point
TP4
PA9 USB VBUS SB21 ON SB21 OFF -
PA10 USB ID SB29 ON SB29 OFF -
PA11 USB DM SB26 ON SB26 OFF -
PA12 USB DP SB27 ON SB27 OFF -
PD10
USB FS PWR
EN
NUCLEO-H745ZI-Q /
NUCLEO-H755ZI-Q: JP8 ON
NUCLEO-H7A3ZI-Q: JP8 OFF
NUCLEO-H745ZI-Q /
NUCLEO-H755ZI-Q: JP8 OFF
NUCLEO-H7A3ZI-Q: JP8 OFF
-
PF10
USB FS PWR
EN
NUCLEO-H745ZI-Q /
NUCLEO-H755ZI-Q: SB91 OFF
NUCLEO-H7A3ZI-Q: SB91 ON
NUCLEO-H745ZI-Q /
H755ZI-Q: SB91 OFF
NUCLEO-H7A3ZI-Q: SB91 OFF
-
PG7 USB FS OVCR SB100 ON SB100 OFF -
1. The default SBx / JPx state is shown in bold.
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ST NUCLEO-H755ZI-Q Specifications

General

Brand	ST
Model	NUCLEO-H755ZI-Q
Category	Motherboard
Language	English