ST microcontroller RMII interface

LORRAIN SYSTEMS provides modular data centers, thermal containment, intelligent PDU, 800G transceivers, liquid cooling, AI interconnects, and edge networking solutions for sustaina...

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Sep 29, 2025

STM32F4 & Ethernet configuration (RMII)

Given you use the RMII interface to the STM32F4 MCU does anybody know what the CR (clock range) needs to be configured to? The RMA is not clear if the clock range configuration is for

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Mar 19, 2026

AN-1794 Using RMII Master Mode (Rev. A)

ABSTRACT Texas Instruments PHYTER® family of products incorporate the Reduced Media Independent Interface (RMII) as described in the RMII revision 1.2 specification from the RMII

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Sep 14, 2025

ADC value affected by ETH PHY 50 MHz from RMII

Ethernet reference clock affecting ADC values in STM32 microcontrollers In various STM32 microcontroller applications, the Ethernet

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Feb 25, 2026

Differences between MII and RMII interfaces

Media-independent interface (MII) defines the interconnection between the MAC sublayer and the PHY for data transfer at 10 Mbit/s and 100

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Jun 06, 2026

AN3966_V2.book

AN3966 Application note LwIP TCP/IP stack demonstration for STM32F4x7 microcontrollers Introduction STM32F4x7 microcontrollers feature a high-quality 10/100 Mbit/s Ethernet peripheral that supports

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Dec 06, 2025

proggen

Um aber mit einem Netzwerk verbunden zu werden, ist noch ein PHY (Physikalische Schnittstelle) notwendig. Da dieser über MII (Media Independent Interface)

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Apr 05, 2026

Developing applications on STM32Cube with LwIP TCP/IP stack

When working with an Ethernet communication interface, a TCP/IP stack is mostly used to communicate over a local or a wide area network. This user manual is intended for developers who use

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Dec 19, 2025

STM32 Ethernet: Hardware Setup, LWIP & Ping Test

This video walks through the complete STM32 Ethernet setup — hardware connections, CubeMX configuration for RMII/MII, LWIP static IP setup,

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Mar 29, 2026

Developing applications on STM32Cube with LwIP TCP/IP stack

Some STM32 microcontrollers feature a high-quality 10/100 Mbit/s Ethernet peripheral that supports both Media Independent Interface (MII) and Reduced Media Independent Interface (RMII) to interface with

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Sep 10, 2025

How to use Gigabit Ethernet with MCU?

I am new at ethernet and it comes complex. Trying to use STM32''s RMII interface with switch. I just want to see at IT''s switch gigabit port. I don''t

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Apr 09, 2026

STM32F407VG | Product

The STM32F405xx and STM32F407xx family is based on the high-performance Arm® Cortex®-M4 32-bit RISC core operating at a frequency of up to 168 MHz.

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Mar 23, 2026

STM32 Ethernet Explained

On the hardware side, it covers the Ethernet architecture based on the STM32 MAC and external PHY connection, explaining how the RMII interface simplifies wiring by requiring only nine

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Jan 01, 2026

What is the use of MII and RMII interfaces in STM32 network

Reduced media-independent interface: RMII (Compact Media Independent Interface). The Compact Media Independent Interface (RMII) specification reduces the number of pins between the

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May 25, 2026

STM32H573VITxQ RMII interface

Solved: I''m planning to build a low-power Ethernet project using the STM32H573VI microcontroller. I need to use an SMPS to lower power consumption

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Dec 22, 2025

stm32cubeide

Tried searching on some websites but didn''t get a clear idea about MII and RMII and suggestions are welcome. It is used mainly to connect Ethernet chips. RMII has less "wires" and

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Apr 16, 2026

XMC7000 microcontrollers: Ethernet RMII reference

XMC7000 has Ethernet MAC that can be interfaced to PHY IC using the reduced media-independent interface (RMII). The RMII interface typically uses 50 MHz as the reference clock for

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Oct 11, 2025

RMII or MII?

I never heared of a 25Mhz RMII clock mode. The only thing I know is that it is possible with some PHYs (LAN8720A) to use it in RMII mode with an external 25Mhz crystal and the PHY will

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Jul 12, 2025

ST STM32H735G-DK USER MANUAL Pdf Download

The Ethernet PHY is connected to the STM32H735IGK6 microcontroller through an RMII interface. Page 27: Cn10 Audio Green Jack - Line Out CN1 50 Ω SMA

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Aug 03, 2025

STM32 Ethernet Explained

The MII interface is the most complex, requiring 18 pins to interconnect the MAC and PHY, whereas RMII requires only 9 pins. The table in Appendix B (below) summarises which STM32

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Jul 22, 2025

Ethernet

Fast Ethernet is a cost-effective solution for delivering higher bandwidth connectivity while ensuring full compatibility with existing 10 Mbit/s Ethernet infrastructures. It

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Nov 30, 2025

How can i change the interface RGMII to RMII using CubeMX?

Hello Guys Like the subject, I want change the interface RGMII to RMII using CubeMX. (RealTek-RTL8211EG-VB-CG => Microchip - LAN8720AI-CP) Based on STM32MP157C-EV1 Code

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Aug 29, 2025

Network Management Interfaces

The SPC57K-Discovery is designed to address SPC57K line Power Architecture® Microcontrollers with full access to several peripherals such as the Fast Ethernet Controller interfaced in RMII mode.

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Jun 06, 2026

Solved: STM32H7 and 10BASE-1TS

the LAN8651 is supposed to give T1S capabilities to almost all microcontrollers without the need of an internal MAC layer processing so any

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Mar 27, 2026

Ethernet device tree configuration

Enable the Ethernet block by setting status = "okay". Configure the pins in use via pinctrl, through pinctrl-0 (default pins), pinctrl-1 (sleep pins) and pinctrl-names. Configure Ethernet interface used phy-mode

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Jul 10, 2025

Mongoose :: Articles :: STM32 Ethernet Explained

The MII interface is the most complex, requiring 18 pins to interconnect the MAC and PHY, whereas RMII requires only 9 pins. The table in Appendix B summarises which STM32 microcontrollers have

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Dec 09, 2025

Media-Independent Interface (MII & RMII) in Ethernet

The Media-Independent Interface (MII) serves as a standardized method for connecting Ethernet MAC (Media Access Control) devices to PHY

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Dec 31, 2025

Ethernet Configuration using STM32H742VGT6 & KSZ8

We have designed a boards, main board has STM32H742VGT6 and it is connected to Microchip PHY IC KSZ8091RNBCA in RMII Mode, Onboard

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Jun 22, 2026

Electronic Components and Parts Search | DigiKey

Search DigiKey''s expansive product index to find detailed product information and pricing on millions of in-stock products. We get technical, so you can search with

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Dec 02, 2025

KSZ8863 RMII Interface and STM32f207 Communication

Posted on November 09, 2017 at 20:22 Hello, I am currently using HAL library to interface my STM32F207 to a KSZ8863 switch using RMII Interface. The clock 25 Mhz provided externally which

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Feb 05, 2026

Datasheet

STM32H742xI/G STM32H743xI/G 32-bit Arm® Cortex®-M7 480MHz MCUs, up to 2MB flash, up to 1MB RAM, 46 com. and analog interfaces

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