What is the difference between Sgmii and RGMII?

What is the difference between Sgmii and RGMII?

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 is PMA and PCS?

The physical coding sublayer (PCS) is a networking protocol sublayer in the Fast Ethernet, Gigabit Ethernet, and 10 Gigabit Ethernet standards. It resides at the top of the physical layer (PHY), and provides an interface between the Physical Medium Attachment (PMA) sublayer and the media-independent interface (MII).

Is Sgmii a serdes?

SGMII, which was defined by Cisco, utilizes two pairs of SERDES / LVDS differential buses to carry transmit and receive data at 1.25 Gbps. A differential receive clock is also defined but is optional and typically not used. Instead, the receive clock is recovered from the data on the differential pair.

Is RGMII a differential?

Serial gigabit media-independent interface It uses differential pairs at 625 MHz clock frequency DDR for TX and RX data and TX and RX clocks.

What is Ethernet PCS PMA?

– PCS – Physical Coding Sublayer. – PMA – Physical Medium Attachment layer. – PMD – Physical Medium Dependent layer.

What is PMA in PCIE?

The Physical Media Attachment (PMA) Layer includes high-speed analog and digital circuitry for PCI Express signaling, also includes differential drivers and receivers for on lane in a link.

What is the difference between usgmii and QSGMII?

SGMII support single 10M/100M/1G network port over 1,25Gbps SERDES between MAC and PHY, while QSGMII support 4 10M/100M/1G network ports over 5Gbps SERDES between MAC and PHY. USGMII support 8 10M/100M/1G network ports over 10Gbps SERDES between MAC and PHY.

What is serial gigabit media independent interface (SGMII)?

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 the difference between 1000BASE-X and SGMII?

The main difference is in the auto-negotiation capabilities. In 1000Base-X, auto-negotiation is limited to flow-control (and duplex, which is not really used since it’s always full-duplex). In SGMII, auto-negotiation also allows the PHY to indicate to the MAC the post-PHY link speed.

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.