Ruigu Electronic

Implementing DFP/UFP Role Detection Design for USB 2.0 OTG Upgrade to Type-C

2025-11-18

USB Type-C cables, sockets, and plugs are designed to be more durable and user-friendly than existing USB cables (Micro-A, Type-A, and Type-B). For example, current Type-A plugs can only be inserted into Type-A sockets in one orientation. However, Type-C can be plugged into devices either way. This simple change eliminates the inconvenience caused when users mistakenly insert USB devices into USB sockets incorrectly.

As USB products consume increasing amounts of power through VBUS and demand faster charging speeds, the USB Type-C standard delivers the power required to support today’s and tomorrow’s electronic devices. To fully leverage Type-C’s advantages, companies must modify their existing products to comply with the Type-C standard. While initiating this process may seem daunting, this article details the minimum requirements for transitioning from USB 2.0 OTG products to USB Type-C compatible products.

USB 2.0 On-The-Go (OTG) is primarily used in portable devices such as smartphones or tablets, functioning as either a USB host or a USB peripheral. All USB 2.0 OTG products must utilize a Micro-A/B socket.