Usb Otg2 Hs And Fs; Table 9. Usb Otg2 And Usart1 Function Configuration; Figure 23. Power; Figure 30. Rs232 - ST STM32H743I-EVAL User Manual

Hardware layout and configuration
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A green LED LD10 lights up in one of these cases:
• Power switch (U18) is ON and the STM32H743I-EVAL board works as a USB host
•
V is powered by another USB host when the STM32H743I-EVAL board works as a
BUS
USB device.
The red LED LD8 lights up when an overcurrent occurs (I
The STM32H743I-EVAL board should be powered by an external power supply when using
OTG function.
JP2 and SB50 must be removed when using USB OTG FS as mentioned in

USB OTG2 HS and FS

The STM32H743I-EVAL Evaluation board supports USB OTG2:
•
High-speed communication through a USB Micro-AB connector (CN14), USB
high-speed PHY (U13) for high-speed function
•
Full-speed communication through another USB Micro-AB connector (CN16)
The Evaluation board can be powered by these USB connectors (CN14 or CN16) at 5 V DC
with 500 mA current limitation.
As several OTG2 FS signals are shared with the OTG2 HS ULPI bus and USART1, some
PCB reworks are needed when using OTG2 FS (CN16) as shown in

Table 9. USB OTG2 and USART1 function configuration

Function
OTG2 HS-CN14 (Default)
OTG2 FS-CN16
USART1 (Default)
A USB power switch (U14) is also connected on V
(with SB27 and SB30 closed and SB28 and SB29 open) or CN16 (with SB28 and SB29
closed and SB27 and SB30 open).
Green LED LD5 (for CN14) or LD7 (for CN16) lights up in one of these cases:
•
Power switch (U14) is ON and the STM32H743I-EVAL board works as a USB host.
•
V is powered by another USB host when the STM32H743I-EVAL board works as a
BUS
USB device.
The red LED LD6 lights up when an overcurrent occurs (I
The STM32H743I-EVAL board should be powered by an external power supply when using
OTG function.
RS232
Communication through RS232 is supported by the D-type, 9-pins connector CN2, which is
connected to the USART1 of the STM32H743XI on the STM32H743I-EVAL Evaluation
Mount
R104,R105,SB27,SB30
R254,SB48,SB28,SB29
SB47,SB49
SB46,SB51
and provides power to either CN14
BUS
DocID030511 Rev 1
> 500 mA).
VBUS
Table 11.
Table 9.
Remove
R254,SB48,SB28,SB29
R104,R105,SB27,SB30,
SB46,SB51
SB47,SB49
> 500 mA).
VBUS
UM2198