
Hardware layout and configuration
UM1667
18/59
UM1667 Rev 3
4.8
USB OTG2 HS and FS
The STM32429I-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
Table 8
.
A USB power switch (U6) is connected on VBUS and provides power to either:
•
CN9 (with R81 and R97 mounted and R83 and R95 un-mounted)
•
CN15 (with R83 and R95 mounted and R81 and R97 un-mounted)
Green LED LD5 (for CN9) or LD9 (for CN15) will be lit when either:
•
Power switch (U6) is ON and STM32429I-EVAL is acting as a USB host.
•
VBUS is powered by another USB host, and STM32429I-EVAL is acting as a USB
device.
Red LED LD6 is lit if over-current occurs.
4.9 RS-232
and
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 STM32F429NIH6 on the
STM32429I-EVAL evaluation board.
Table 8. USB OTG2 configuration
Function
Mount
Remove
OTG2 HS-CN9 (Default)
R108, R112, R81,R97
R260, R264, R83,R95
OTG2 FS-CN15
R260, R264, R83,R95
R108, R112, R81,R97
Table 9. RS-232 and IrDA related jumper
Jumper
Description
JP7
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:
1 2 3
1 2 3
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