Document No.: AN1087
www.geehy.com Page 1
1 Introduction
At present, APM32F4xx series has high-speed and full-speed two USB controllers, both of which
support OTG, and the USB high-speed controller has two interfaces. This application note explains the
examples based on APM32F4xx_OTG_SDK. This software development kit can be downloaded from
APM32F4xx software support on the official website of Geehy.