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OCP 2.2: new specifications to improve SoC performance
OCP-IP (Open Core Protocol International Partnership) plans to release a new version of the specifications, OCP 2.2 to improve system-on-a-chip (SoC) performance. Created by SoC developer Sonics, OCP-IP now includes more than 140 companies, including design automation (EDA) vendors, intellectual property creators, design houses and universities. OCP-IP, the organization claims, provides a generic interface (socket) standard that can be applied to any microarchitecture or processor core.
In OCP 2.2 will support flexible multi-frequency synchronization and data bit sequences read from two-dimensional blocks, precise (non-blocking) flow control options, more flexible restart behavior, new security profiles to describe the data markup needed to protect information, as well as a new section with a control code for verification.
In particular, in OCP 2.2 Added the EnableClk signal, allowing the system to dynamically control the effective clock frequency without resorting to phase locked loop or additional low distortion clock distribution circuits. Support for data bit sequences from 2D blocks in batch mode is required for interaction with graphics or video subsystems working with 2D frame buffers stored in external memory. All necessary information is encoded in these sequences to obtain the entire two-dimensional packet on one request, which allows to increase the interface performance and optimize access to the RAM pages.
New non-blocking flow control added to facilitate the development of fully synchronous designs. This allows you to control multiple data streams even with a significant increase in clock speed. Additionally, the specifications section describes the verification of compatibility, configuration and functionality of the OCP interface.
Work on OCP 2.2 was conducted as part of the OCP-IP Specification Working Group, which included representatives from MIPS Technologies, Nokia, Sonics, Texas Instruments and Toshiba.