User manual

Note DFU bootloader uses the USB_OTG1 port, and a "USB micro-A" cable is required.

Pin # Signal Name

1 +5V_OTG1_PWR

2 USB_OTG1_D-

3 USB_OTG1_D+

4 PA10/OTG1_FS_ID

5 GND

6.5 USB_OTG2

USB On-The-Go, often abbreviated USB OTG, is a specification that allows USB devices such as

digital audio players or mobile phones to act as a host allowing a USB flash drive, mouse, or

keyboard to be attached and also connecting USB peripherals directly for communication purposes

among them.

Pin # Signal name

1 +5V_OTG2_PWR

2 USB_OTG2_D-

3 USB_OTG2_D+

4 PB12/OTG2_HS_ID

5 GND

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