What is the 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.
What speed is Sgmii?
The SERDES circuitry is configured to support source synchronous and asynchronous serial data communication for the SGMII interface at 1.25 Gbps.
Is Sgmii an Ethernet?
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.
What is Sgmii Ethernet?
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.
How fast is RGMII?
RGMII operates at 125 MHz in Gigabit mode, 25 Mhz in 100 Mbps mode and 2.5 MHz in 10Mbps mode.
What is SGMII used for?
The serial gigabit media-independent interface (SGMII) is a variant of MII, a standard interface used to connect an Ethernet MAC block to a PHY. It is used for Gigabit Ethernet but can also carry 10/100 Mbit/s Ethernet.
What is a serial GMII interface?
Serial-GMII Specification The Serial Gigabit Media Independent Interface (SGMII) is designed to satisfy the followingrequirements: Convey network data and port speed between a 10/100/1000 PHY and a MAC with significantly less signal pins than required for GMII. Operate in both half and full duplex and at all port speeds.
What is the difference between RGMII and SGMII?
RGMII version 1.3 uses 2.5V CMOS, whereas RGMII version 2 uses 1.5V HSTL. 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.
What is the 4-wire interface in Cisco SGMII?
•Cisco SGMII spec rev 1.7 only calls out 6-wire and 8-wire interface– the 4-wire interface is an industry de-facto standard •Freescale PowerQUICC®devices to date only implement 4-wire interface •4-wire interface relies on Clock Data Recovery to reconstruct clock from transmitted data.