NUC920ABN Datasheet, PDF (184/529 Pages) Nuvoton Technology Corporation – 32-BIT ARM926EJ-S BASED MCU

NUC920ABN
32-BIT ARM926EJ-S BASED MCU
6.8
USB Host Controller (USBH)
The Universal Serial Bus (USB) is a fast, bi-directional, isochronous, low-cost, dynamically attachable
serial interface standard intended for USB devices. The USB is a 4-wire serial cable bus that supports
serial data exchange between a Host Controller and a network of peripheral devices. The attached
peripherals share USB bandwidth through a host-scheduled, token-based protocol. Peripherals may be
attached, configured, used, and detached, while the host and other peripherals continue operation (i.e.
hot plug and unplug is supported).
A major design goal of the USB standard was to allow flexible, plug-and-play networks of USB devices. In
any USB network, there will be only one host, but there can be many devices and hubs.
The USB Host Controller includes the following features
 Fully compliant with USB Revision 2.0 specification.
 Enhanced Host Controller Interface (EHCI) Revision 1.0 compatible.
 Open Host Controller Interface (OHCI) Revision 1.0 compatible.
 Supports high-speed (480Mbps), full-speed (12Mbps) and low-speed (1.5Mbps) USB devices.
 Supports Control, Bulk, Interrupt, Isochronous and Split transfers.
 Integrated a port routing logic to route full/low speed device to OHCI controller.
 Built-in DMA for real-time data transfer.
Publication Release Date: Jun. 18, 2010
184
Revision: A3