M263 datasheet(331/398 Pages) NUVOTON

331 / 398 page

M261/M262/M263

Mar 25, 2020

Page 331 of 398

Rev 1.02

6.31

USB On-The-Go (OTG)

6.31.1

Overview

The OTG controller interfaces to USB PHY and USB controllers which consist of a USB 1.1 host

controller and a USB 2.0 FS device controller. The OTG controller supports HNP and SRP protocols

defined in the “On-The-Go and Embedded Host Supplement to the USB 2.0 Revision 2.0

Specification”.

USB frame, including USB host, USB device, and OTG controller, can be configured as Host-only,

Device-only, ID-dependent or OTG Device mode defined in USBROLE (SYS_USBPHY[1:0]). In Host-

only mode, USB frame acts as USB host. USB frame can support both full-speed and low-speed

transfer. In Device-only mode, USB frame acts as USB device. USB frame only supports full-speed

transfer. In ID-dependent mode, USB frame can be USB Host or USB device depending on

USB_OTG_ID pin state. In OTG device mode, the role of USB frame depends on the definition of

OTG specification. USB frame only supports full-speed transfer when OTG device acts as a

peripheral.

6.31.2

Features



Built in USB PHY



Configurable to operate as:

–

Host-only

–

Device-only

–

ID-dependent: The role of USB frame is only dependent on USB_OTG_ID pin value--as

USB Host (USB_OTG_ID pin is low) or USB Device (USB_OTG_ID pin is high). Not

support HNP or SRP protocol.

–

OTG device: dependent on USB_OTG_ID pin status to be A-device (USB_OTG_ID pin is

low) or B-device (USB_OTG_ID pin is high). Support HNP and SRP protocols.

M263 Datasheet(PDF) 331 Page - Nuvoton Technology Corporation