Hardware layout and configuration UM2469
20/59 UM2469 Rev 1
7.9 USB OTG HS
The STM32F7308-DK board supports USB OTG high-speed communication via a USB
Micro-AB connector.
A USB power switch is also connected on V
BUS
and provides power to CN19.
The green
LED LD8 is lit in one of these cases:
• Power switch is ON and STM32F7308-DK board works as a USB host
• V
BUS
is powered by another USB host when STM32F7308-DK board works as a USB
device.
The red LED LD7 is lit when an overcurrent occurs.
Note:1 When the STM32F7308-DK board is powered by the ST-LINK then the OTG function can
provide up to 100
mA.
Note:2 When the STM32F7308-DK board is powered by an external power supply then the OTG
function can provide more than 100
mA, according to the external power supply capability.
Note:3 When the STM32F7308-DK board is powered by an external power supply through USB HS
connector (CN19), in device mode, do not use a PC as power source (see
Section 7.4.4.)
7.10 USB OTG FS
The STM32F7308-DK board supports USB OTG full speed communication via a USB
Micro-AB connector.
A USB power switch is also connected on V
BUS
and provides power to CN18.
The green
LED LD9 is lit in one of these cases:
• Power switch is ON and the STM32F7308-DK board works as a USB host
• V
BUS
is powered by another USB host when the STM32F7308-DK board works as a USB
device.
The red LED LD10 is lit when an overcurrent occurs.
Note:1 When the STM32F7308-DK board is powered by the ST-LINK then the OTG function
provides up to 100
mA.
Note:2 When the STM32F7308-DK board is powered by an external power supply then the OTG
function provides more than 100
mA, according to the external power supply capability.
Note:3 When the STM32F7308-DK board is powered by an external power supply through USB FS
connector (CN18), in device mode, do not use a PC as power source (see
Section 7.4.5)
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