Reduced Media-Independent Interface (RMII) PHY incorporates the Reduced Media-Independent Interface (RMII) as specified in the Reduced Media-Independent Interface (RMII) specification v1.2. The purpose of this interface is to provide a reduced pin count alternative to the IEEE 802.3 MII as specified in Clause 22.. The Gigabit Media Independent Interface (GMII), specified by IEEE Std 802.3 Clause 35, is a standard interface designed to facilitate a simple and standardized connection between the Media Access Control (MAC) layer and Physical Layer (PHY) devices in Gigabit Ethernet applications, supporting data rates up to 1 Gbps.

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interface types (MII, GMII, RGMII) advantages and disadvantages
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PPT Fast and Gigabit PowerPoint Presentation, free
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2 > Networkrelated interface summary description (MII RMII SMII GMII
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Verilog's method of implementing any clock cycle delay Programmer Sought
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Using AXI Subsystem and in a Multiport
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DP83867IR RGMII timing questions Interface forum Interface TI
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Fast and Gigabit ppt download
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PPT Fast and Gigabit PowerPoint Presentation, free
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What is Gigabit Media Independent Interface (GMII)? Embedded Hardware
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PPT Introduction to the PowerPoint Presentation
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What is RGMII (Reduced Gigabit Media Independent) Interface? Embedded
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work mechanism, the relationship between different interface
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代码分析：GMII接口控制以太网UDP发送 知乎

GMII interface is shown in Figure 14. 2. Figure 14.2 GMI Interface. Compared with the MII interface, the data width of the GMII is changed from 4 bits to 8 bits. The control signals in the GMII interface such as TX_ER, TX_EN, RX_ER, RX_DV, CRS, and COL function the same as those in the MII interface.. For gigabit speeds, the GMII ('G' for gigabit) interface is used, with a reduced pincount version called RGMII. A very reduced pincount version called SGMII is also available ('S' for serial) which requires special capabilities on the IO pins of the MAC, whereas the other xMIIs are relatively conventional logic signals.

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