What is host mode and device mode in USB?
In USB host mode, the Android-powered device acts as the host. Examples of devices include digital cameras, keyboards, mice, and game controllers. When the Android-powered device is in USB accessory mode, the connected USB hardware (an Android USB accessory in this case) acts as the host and powers the bus.
How do I know if a cable is OTG?
An OTG cable has a micro-A plug on one end, and a micro-B plug on the other end (it cannot have two plugs of the same type). OTG adds a fifth pin to the standard USB connector, called the ID-pin; the micro-A plug has the ID pin grounded, while the ID in the micro-B plug is floating.
What’s the difference between FS, HS, and OTG?
FS stands for “full-speed”, 12 Mb/s (USB 1.0/1.1). HS stands for “high-speed”, 480 Mb/s (USB 2.0). There is another higher speed in use, “Super-speed”, which is 5 Gb/s (USB 3.0). Higher speeds still (e.g. 10 Gb/s) have been announced, but I’m not sure there are any products using them. The Host is the electronics…
What’s the difference between USB OTG HS and USB device?
USB OTG HS: able to act as a device/host/OTG peripheral, at full speed (12Mbps) or high speed (480Mbps). Note that the HS core for [the vast majority of]* ST MCUs require an external ULPI PHY chip to actually support high speed.
What’s the difference between a FS and a HS?
FS stands for “full-speed”, 12 Mb/s (USB 1.0/1.1). HS stands for “high-speed”, 480 Mb/s (USB 2.0). There is another higher speed in use, “Super-speed”, which is 5 Gb/s (USB 3.0). Higher speeds still (e.g. 10 Gb/s) have been announced, but I’m not sure there are any products using them.
What does OTG _ FS _ SOF do on the STM32?
When using the USB host mode, the STM32 has a pin named OTG_FS_SOF that ST gives very little useful information (in both Datasheet and USB tech documents) other than it has something to do with syncing when driving Audio devices.