USB input/output controller IP for SoC integration
The digital USB protocol controller within a chip
A USB I/O controller IP core is digital logic integrated into a system-on-chip to manage USB transactions and connect that traffic to the chip’s processor and memory system. It is a design block supplied for integration, rather than a plug-in I/O module or an external transceiver. The processor interface, protocol role and matching PHY must be defined together.
Digital USB input/output controller IP cores integrated into SoCs, using host, peripheral or dual-role configurations as specified by the IP supplier. External ULPI PHY ICs are on 6531; complete custom ASIC design projects on 3590. USB hubs, connector assemblies, complete scaler/display chips and industrial PLC I/O modules are separate products. This is a defined USB implementation of on-chip I/O control, not a claim about an unidentified scaler chip.
CNFX editorial research · Sources checked October 18, 2026 · 3 sources
Select the protocol role and software interface before fixing the core configuration
Synopsys lists separate host/device offerings and a USB 2.0 HS OTG controller that can operate as host or peripheral; its catalogue also identifies an EHCI host-controller option. Those are configuration/product choices, not evidence that every delivered controller supports every role. Identify the licensed core, revision and selected role in the integration specification. [1]
Cadence’s USB3 controller page separately lists an xHCI host offering for USB 3.0, alongside device and dual-role offerings for USB 3.0/3.1. It describes controller, PHY and firmware as parts of the SoC solution. Specify the required software-facing interface and role implementation rather than transferring an EHCI configuration from another controller family. [2]
02
Treat the processor path and PHY connection as separate interfaces
Synopsys describes an AHB processor interface, configurable buffering and pre-fetch options in its USB 2.0 controller offering. Its PHY-side options distinguish ULPI for a discrete PHY from UTMI/UTMI+ for an integrated PHY. Buffering and processor-bus access therefore need to be agreed alongside the external USB role. The digital controller is not the analogue PHY. [1]
Cadence’s page describes scatter/gather DMA and a separate system-bus integration path in its controller family. Establish which features belong to the selected core and configuration, how memory is accessed and which firmware is delivered. A family feature list does not prove the sustained application throughput of an integrated chip. [2]
Synopsys’s nanoPHY-to-OTG application note provides a concrete integration example: release the PHY power-on reset first, wait for the PHY clock, and only then release the paired controller reset. The note also distinguishes OTG-capable and non-OTG configurations. Keep that sequence attached to the identified pair; another PHY/controller combination requires its own clock, power and reset requirements. [3]
03
Specify the core configuration and the interfaces to be verified
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Compiled and source-reviewed by the CNFX editorial team.
Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review
· Page last updated 18 October 2026
Buyer questions
Is a USB controller IP core the same as an external ULPI transceiver?
The controller is the digital protocol block. Synopsys describes ULPI or UTMI/UTMI+ connections to a separate PHY boundary; its integration note gives the clock/reset sequence for one identified controller/PHY pair. [1][3]
Can an EHCI configuration be assumed for any USB host core?
Synopsys identifies an EHCI host option in its USB 2.0 family, while Cadence separately lists an xHCI host offering for USB 3.0. Specify the licensed core and required software interface. [1][2]
Sources and evidence scope
Sources checked 2026-10-18. The product pages establish configurable digital-controller offerings; the application note describes one paired PHY integration. No data rate, power, ESD or package claim is assigned to an unspecified SoC from these IP descriptions.
