DocID022136 Rev 5
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UM1460
Hardware layout and configuration
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2.17 USB-OTG
HS
The STM3241G-EVAL evaluation board enables USB-OTG HS communication via USB
micro-AB connector (CN9), USB high-speed PHY (U8) and USB power switch (U4)
connected to VBUS. The STM3241G-EVAL can be powered by CN9 at 5 V DC with a
500 mA current limitation.
LED LD7 indicates that USB power switch (U4) is ON and STM3241G-EVAL is working as a
USB host, or that VBUS is powered by another USB host when STM3241G-EVAL is
working as a USB device. LED LD8 indicates an over-current.
The USB ULPI bus is shared with the CAN2 bus. JP10 and JP3 must be kept open for USB-
OTG HS.
Note:
On MB786 boards prior to version B03 it is possible that after a board RESET the MCU is no
longer able to control communication with the OTG PHY (U8). When this issue occurs the
only way to recover OTG PHY control is to power the board OFF and ON. This issue is fixed
on MB786 version B03 or newer.
2.18 Camera
module
A camera module is connected to the DCMI bus of the STM32F417IGH6 and shares the
same I/Os with the motor control connector. SB16 must be kept open for camera module
application. There are two possible modules and omnivision cameras populated on the
CN15 connector of the board:
•
1.3 Megapixel: Module CN01302H1045-C: Camera OV9655
•
2 Megapixel: Module CN020VAH2554-C: Camera OV2640
Note:
1
When the camera demo loaded in Flash is executed, some green pixels may appear in high-
contrast zones, depending on the image captured.
2
The camera is not firmly fitted on its connector (CN15). It is possible that during shipment
the camera could be unplugged. In this case the user needs to plug it into the correct
position as shown on the picture below (pin 1 dot on top left corner of the socket).
It is not recommended to remove it, in order to avoid false contact later.
Table 13. microSD card related jumper
Jumper
Description
JP31
To disable USB-OTG PHY U8, JP31 is not fitted.
Default setting: Fitted
Table 14. Camera module related jumpers
Jumper
Description
JP26
To set power down mode for the camera module, JP26 is fitted.
Default setting: Not fitted
SB16
Description of SB16 is in
Section 2.9: Motor control
.
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