Hardware Layout and configuration
UM1935
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5.8
USB OTG2 HS and FS
STM32479I-EVAL evaluation board supports USB OTG2:
High speed communication via a USB Micro-AB connector (CN8), USB High speed
PHY (U8) for high speed function.
Full speed communication via another USB Micro-AB connector (CN14).
The evaluation board can be powered by these USB connectors (CN8 or CN14) at 5V DC
with 500mA current limitation.
As several OTG2 FS signals are shared with OTG2 HS ULPI bus, so some settings are
needed, when using OTG2 FS (CN14) shown in
Table 7: USB OTG2 function configuration
.
A USB power switch (U7) is also connected on V
BUS
and provides power to either:
CN8 (with SB13 and SB16 closed and SB14 and SB15 open)
CN14 (with SB14 and SB15 closed and SB13 and SB16 open).
Green LED LD5 (for CN8) or LD9 (for CN14) will be lit when either:
Power switch (U7) is ON and STM32479I-EVAL works as an USB host
V
BUS
is powered by another USB host when STM32479I-EVAL works as an USB
device.
Red LED LD6 will be lit when over-current occurs (I
VBUS
> 500 mA).
5.9 RS232
and
IrDA
RS232 and IrDA communication is supported by D-type 9-pins RS232 connector CN7, and
IrDA transceiver U1, which is connected to USART1 of STM32F479NIH6 on STM32479I-
EVAL evaluation board. The signals Bootloader_RESET and Bootloader_BOOT0 are added
on RS232 connector CN7 for ISP support.
USART1 of STM32F479NIH6 is shared with RS232/IrDA and ST-LINK/V2-1 controller.
Its communication can be changed by setting JP15 and JP19.
Table 7. USB OTG2 function configuration
Function
ON
OFF
OTG2 HS-CN8 (Default)
R109, SB13, SB16, SB74
R255, SB14, SB15, SB70
OTG2 FS-CN14
R255, SB14, SB15, SB70
R109, SB13, SB16, SB74
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