PHY 与 MC 通过 DFI 接口连接的部分因为需要采样和驱动 DFI 信号，也处于 DFI 时钟域，PHY 这部分与 DFI 打交道的逻辑被称为 PHY 接口模块（PHY Interface Module），该模块的时钟被称为 DFI PHY CLK。

DFI 全称 DDR PHY Interface， 是 DDR controller 和 DDR PHY 之间的行业标准接口。 通过 DFI 标准化 PHY 接口之后，增进了不同厂商的 DDR Controller/PHY IP 之间的互操作性，减少了集成开发 DDR 子系统的成本。

2022年12月28日 · dfi_phyupd_req信号表示的是phy需要DFI保持一个idle状态用于phy自身产生更新同时MC不要发送一些控制信息； 一旦dfi_phyupd_req信号拉高就必须保持直到dfi_phyupd_ack信号回应；

2024年7月19日 · DDR PHY Interface (DFI)是一个接口协议，定义了在a cross the DFI以及在DDR memory controller（MC）和DDR PHY（PHY）之间传输命令信息和数据 所要求的signals、timing parameters、programmable parameters。 可编程参数（programmable parameters）是由MC、PHY或系统定义的选项，并被编程到MC 和/或 PHY中。 DFI协议并不包括MC或PHY的所有功能，也没有对MC或PHY接口与系统的其他方面设置任何限制。 在每个接口组内都有信号和参数 …

2016年9月5日 · The DDR PHY Interface (DFI) is used in several consumer electronics devices including smart phones. DFI is an interface protocol that defines signals, timing, and programmable parameters required to transfer control information and data to and from the DRAM devices, and between MC (Micro Controller) and PHY.

本期翻译了 DFI 最新 5.1 版本协议的目录，读者通过目录可以来大概了解 DFI 协议有哪些内容。 Overview // 概览; Architecture // 架构; Clocking // 时钟; Optional Protocols // 协议可选支持部分; DFI Feature Requirements // DFI 特性; Gobal Features // 全局特性

The DFI specification defines an interface protocol between memory controller logic and PHY interfaces, with a goal of reducing integration costs while enabling performance and data throughput efficiency.

For decades, DFI has been dedicated to developing reliable embedded solutions for the power and energy industries. DFI’s embedded box PCs and panel PCs offer optimal, ruggedized solutions for energy applications. They are equipped with enhanced, highly reliable system components, and fanless and cable-free designs.

Join Power Financial Credit Union in Florida and enjoy great banking solutions including auto loans, credit cards, savings, mortgage loans and more.

DFI's Low Power Consumption products are used to support embedded boards, industrial box PCs, panel PCs, and embedded systems for industries such as automation, Industry 4.0, IoT solutions, AIoT, 5G, autonomous driving, edge computing, and more.