What is 1000BASE KX?
1000BASE-KX is a standard used for connectivity over Electrical Backplanes. This variant uses electrical signaling speed. It has a distance capability of 1 meter. 1000BASE-SX is a standard used for near infrared optical connectivity over Multi-mode fibers.
What is Sgmii in Ethernet?
The serial gigabit media-independent interface (SGMII) is a variant of MII used for Gigabit Ethernet but can also carry 10/100 Mbit/s Ethernet. It uses differential pairs at 625 MHz clock frequency DDR for TX and RX data and TX and RX clocks. It differs from GMII by its low-power and low pin-count 8b/10b-coded SerDes.
What is difference between Rgmii and Sgmii?
The pin count for all three interfaces are different. GMII and RGMII operate at 125 megahertz and SGMII operates at 625 megahertz. The important difference between RGMII and GMII is the pin count. Although RGMII has half the pins of GMII, it can still operate at gigabit speeds using the same clock frequency.
Does Sgmii need PHY?
SGMII support on the MPC8313E is provided through an internal Serializer-Deserializer (SerDes) PHY that converts the parallel data stream into a serial stream.
How fast is 1000BASE-SX?
But it has a minimum transmission distance of 220m and a maximum of 550m. Offering 1Gbps data transmission rate, 1000BASE-SX modules are mainly used to connect high-speed hubs, Ethernet switches, and routers together in different wiring closets or buildings using long cabling runs.
What is Sgmii used for?
The Serial Gigabit Media Independent Interface (SGMII) is a connection bus for Ethernet Media Access Controllers (MACs) and Physical Layer Devices (PHYs) defined by Cisco Systems. It replaces the classic 22-wire GMII connection with a low pin count, 4-pair, differential SGMII connection.
What is MII and RMII?
MII vs RMII for Ethernet Therefore, RMII (reduced MII) was developed as a variant of MII to cut the number of unshareable signals per PHY interface in half (down to 8 per PHY). The RMII specification is also capable of supporting 10 Mbps and 100 Mbps data rates, and there are gigabit-capable variants.
What is Rgmii?
The Reduced Gigabit Media Independent Interface (RGMII) is an alternative to the Gigabit. Media Independent Interface (GMII). In this application note, an RGMII adaptation module is used to reduce the number of pins required to connect the Gigabit Ethernet MAC to a Gigabit PHY from 24 to 12.
What is Sgmii PHY?
What is a PHY transceiver?
An Industrial Ethernet PHY is a physical layer transceiver device for sending and receiving Ethernet frames based on the OSI network model. In the OSI model, Ethernet covers Layer 1 (the physical layer) and part of Layer 2 (the data link layer) and is defined by the IEEE 802.3 standard.
What’s the difference between SGMII and 1000BASE-X SerDes?
To elaborate on @Majenko’s answer, both SGMII and 1000Base-x are dual 1000Mbps SERDES pairs (one in each direction), at least until the 1000Base-X signals reach the optical transceiver. The main difference is in the auto-negotiation capabilities.
What’s the difference between SGMII and Gigabit Ethernet?
In gigabit ethernet it’s the SGMII – Serial Gigabit Media Independent Interface. So your Ethernet chip would connect to a 1000Base-X PHY using SGMII. It could instead connect to a 1000Base-T PHY device using the same SGMII interface. There are PHYs with RGMII, SGMII and MDI. In these case RGMII connect to MAC.
What’s the difference between Mac to PHY and SGMII?
Even though the MAC-to-PHY SGMII link is always 1000Mbps, it supports 10, 100 and 1000Mbps past the PHY and the MAC need to know this to space out the bits properly (e. g. if the external link is 100Mbps, each bit on the SGMII link is sent 10 times). Most Ethernet systems are made up of a number of building blocks.