Table of Contents
What is MDIO register?
Management Data Input/Output, or MDIO, is a 2-wire serial bus that is used to manage PHYs or physical layer devices in media access controllers (MACs) in Gigabit Ethernet equipment. The management of these PHYs is based on the access and modification of their various registers.
What is an MDIO interface?
The MDIO Interface component supports the Management Data Input/Output, which is a serial bus defined for the Ethernet family of IEEE 802.3 standards for the Media Independent Interface (MII). The MII connects Media Access Control (MAC) devices with Ethernet physical layer (PHY) circuits.
Is MDIO the same as I2C?
MDIO – A short history For most pluggable optical transceivers the interface used for monitor and control is the I2C interface. Defined as part of MII in IEEE802. 3 clause45, MDIO can also be used in high speed optical transceivers like CFP, CFP2 or CFP4 instead of 100 Megabit.
What is MDC and MDIO?
Electrical specification The MDIO interface is implemented by two signals: MDIO Interface Clock (MDC): clock driven by the MAC device to the PHY. MDIO data: bidirectional, the PHY drives it to provide register data at the end of a read operation.
What PHY means?
physical layer
A PHY, an abbreviation for “physical layer”, is an electronic circuit, usually implemented as an integrated circuit, required to implement physical layer functions of the OSI model in a network interface controller.
What is PHY in telecom?
A PHY, an abbreviation for “physical layer”, is an electronic circuit, usually implemented as an integrated circuit, required to implement physical layer functions of the OSI model in a network interface controller.
What is the full form of MDIO?
MDIO interface is the abbreviation of management data input / output. MDIO interface is included in IEEE802.3 protocol. It is a serial bus interface for Ethernet PHY management.
What is MDIO in Ethernet PHY?
MDIO interface not only defines the frame format, but also defines the register of accessing space in detail, so it can only be applied to the management interface of Ethernet PHY. For students interested in the detailed definition of MDIO registers, please refer to the descriptions in IEEE 802.322.2.4 (clause22) and 45.2 (clause45).
What is MDIO interface in microcontroller?
MDIO is the data signal of MDIO interface, which is bidirectional signal. Both sta and PHY can take over. It is used to transfer control and status information between PHY control chip and PHY chip. The protocol defines the timing of MDIO interface. As shown in Figure 2, the rising edge of MDC is taken as the benchmark.
What is the difference between MDIO and MDC?
Usually, MDIO is pulled up to the interface power supply through a resistor. As shown in Table 1, MDIO interface consists of two signal lines, one clock line and one data line. MDC is the MDIO interface clock signal from STA to sample MDIO data. MDC can be aperiodic.