Usb Otg2 Hs & Fs; Rs-232 & Irda; Table 7. Usb Otg2 Configuration; Table 8. Rs-232 & Irda Related Jumper - STMicroelectronics STM32439I-EVAL User Manual

Hardware layout and configuration
2.8 USB OTG2 HS & FS
The STM32439I-EVAL evaluation board supports USB OTG2:
•
High speed communication via USB Micro-AB connector (CN9), USB high speed PHY
(U7) for high speed function
•
Full speed communication via USB Micro-AB connector (CN15)
The evaluation board can be powered by these USB connectors (CN9 or CN15) at 5 V DC
with a 500 mA current limitation.
Some OTG2 FS signals are shared with the OTG2 HS ULPI bus, so some PCB rework is
needed when using OTG2 FS (CN15) as shown in
Function
OTG2 HS-CN9 (Default)
OTG2 FS-CN15
A USB power switch (U6) is connected on VBUS and provides power to either:
•
CN9 (with R81 & R97 mounted and R83 & R95 un-mounted)
•
CN15 (with R83 & R95 mounted and R81& R97 un-mounted)
Green LED LD5 (for CN9) or LD9 (for CN15) will be lit when either:
• Power switch (U6) is ON and STM32439I-EVAL is acting as a USB host.
•
VBUS is powered by another USB host, and STM32439I-EVAL is acting as a USB
device.
Red LED LD6 is lit if over-current occurs.
2.9 RS-232 & IrDA
RS-232 and IrDA communication is supported by 9-pin RS-232 D-type connector, CN8, and
IrDA transceiver, U1, which is connected to USART1 of the STM32F439NIH6 on the
STM32439I-EVAL evaluation board.
Jumper Description
JP7
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Table 7. USB OTG2 configuration

Table 8. RS-232 & IrDA related jumper
USART1_RX is connected to RS-232 transceiver and RS-232 communication
is enabled when JP7 is set as shown to the right
(Default setting):
USART1_RX is connected to IrDA transceiver and IrDA communication is
enabled when JP7 is set as shown to the right:
DocID025151 Rev 2
Table 7.
Mount
R108, R112, R81,R97
R260, R264, R83,R95
UM1668
Remove
R260, R264, R83,R95
R108, R112, R81,R97
1 2 3
1 2 3