What is a ULPI interface?
What is a ULPI interface?
ULPI is a standards based interface designed to provide a high capacity point-to-point connection between an SoC or ASIC to a Hi-Speed USB Transceiver, as shown in Figure 2.1. ULPI is a reduced pincount encapsulation and extension of the USB Transceiver Macrocell Interface (UTMI) and UTMI+ Specification.
What is purpose of host controller interface?
A host controller interface (HCI) is a register-level interface that enables a host controller for USB or IEEE 1394 hardware to communicate with a host controller driver in software.
What is a host controller interface?
A Host Controller Interface (HCI) is a register level interface which allows host controller hardware to communicate with the operating system of a host computer. There are three types of USB host controller interface: Open Host Controller Interface (OHCI)
What is the difference between xHCI and Ehci?
The OHCI and UHCI controllers support only USB 1 speed devices (1.5 Mbit/s and 12 Mbit/s), and the EHCI only supports USB 2 devices (480 Mbit/s). The xHCI architecture was designed to support all USB speeds, including SuperSpeed (5 Gbit/s) and future speeds, under a single driver stack.
What is Utmi in USB?
Defines the USB 2.0 Transceiver Macrocell Interface (UTMI) and explores the many operational aspects of the USB 2.0 Transceiver Macrocell (UTM), as well as some of the key features like data serialization, bit stuffing, clock recovery, and more.
What is USB PHY?
The USB1. 1 PHY is an IP version of USB transceiver. It is designed in standard logic to interface with the physical layer of Universal Serial Bus. It is capable of transmitting and receiving serial data at either full speed (12M bit/s) or low speed (1.5M bit/s) data rate.
What are HCI commands?
The HCI Link commands provide the Host with the ability to control the link layer connections to other Bluetooth devices. These commands typically involve the Link Manager (LM) to exchange LMP commands with remote Bluetooth devices. The HCI Policy commands are used to affect the behaviour of the local and remote LM.
What is Intel xHCI mode?
XHCI Mode = Smart Auto – The on-board USB 3.0 port function like a 2.0 port before OS USB 3.0 driver load. If you reboot the OS, during this reboot BIOS phase, BIOS is “Smart” enough to avoid downgrade the USB 3.0 port back to 2.0 functionality before OS USB 3.0 driver load.
What is xHCI handoff?
Well today i found something incredible. I realized that by enabling xhci/ehci hand-off you are essentially bypassing or disabling your motherboard’s usb controllers for windows’ software controllers. If you have windows 7 or above, you need to disable handoff for faster input, and not only that, better polling rate.
What is XHCI handoff?
What is XHCI mode?
What does PHY stand for?
PHY
| Acronym | Definition |
|---|---|
| PHY | Physics |
| PHY | Physical Layer |
| PHY | Physical Layer Protocol |
| PHY | Partnership for Healthy Youth |
What are the characteristics of the ULPI interface?
The clock is running and is stable with the characteristics defined in section 3.6. The ULPI interface carries commands and data that are synchronous to clock. Low Power Mode The PHY is powered down with the clock stopped. The PHY keeps dir asserted, and the data bus is redefined to carry LineState and interrupts.
When did the UTMI ULPI specification come out?
UTMI+ Low Pin Interface (ULPI) Specification UTMI+ Low Pin Interface (ULPI) Specification Revision 1.1 October 20, 2004 UTMI+ Low Pin Interface Specification, Revision 1.1 October 20, 2004
What does ULPI stand for in serial bus?
The Universal Serial Bus (USB) is a serial data interface that supports data exchange between a host computer and a device. ULPI defines an interface between the Link and USB Transceiver to enable a transceiver to Serial Interface Engine (SIE), or “Link”, connection with only 12 pins.
Who are the authors of the ULPI specification?
The present Specification has been circulated for the sole benefit of legally-recognized Promoters, Adopters and Contributors of the Specification. All rights are expressly reserved, including but not limited to intellectual property rights under patents, trademarks, copyrights and trade secrets.