SGMII Protocolos compatibles

Computadoras y servidores

Serial Gigabit Media Independent Interface

¿Qué es SGMII?

SGMII (Serial Gigabit Media Independent Interface) is a serial alternative to GMII and RGMII for Gigabit Ethernet MAC-to-PHY connections. Originally defined by Cisco, SGMII uses a single differential pair in each direction (TX+/-, RX+/-) running at 1.25 Gbps with 8b/10b encoding. SGMII drastically reduces pin count to just 4 signal pins (plus optional reference clock), making it popular in switch ICs, SoCs, and multi-port Ethernet designs where routing many parallel data lines is impractical. Engineers debugging SGMII links need to verify the serial data encoding, auto-negotiation, and link status signaling that occurs in-band within the SGMII data stream.

SGMII Referencia rápida

type Serial, differential
signals TX+/-, RX+/-
max Speed 1.25 Gbps
voltage Range Differential
standard Cisco SGMII

Instrumentos Acute compatibles con SGMII

Serie TravelLogic

Serie TravelLogic
Serie LA4000

Serie LA4000

¿Listo para analizar este protocolo?

Vea cómo los instrumentos Acute capturan y decodifican este protocolo en tiempo real. Solicite una demo o contacte a nuestro equipo.

Solicitar una demo Ver productos compatibles

¿Cómo analizar SGMII con instrumentos Acute

1

Conecte su analizador lógico Acute a los pares diferenciales SGMII TX+/-, RX+/- usando sondas diferenciales apropiadas.

2

Conecte un cable de tierra a la referencia de tierra de la placa objetivo.

3

En el software Acute, seleccione el SGMII protocol decoder y asigne las señales diferenciales a los canales de entrada correspondientes.

4

Configure el decodificador para expected line rate and encoding.

5

Capture y visualice los SGMII data showing Ethernet frame content and in-band auto-negotiation status.

Preguntas frecuentes

Que tasa de muestreo se requiere para el análisis SGMII ?
SGMII operates at 1.25 Gbps serial rate. For data content decoding, this exceeds typical logic analyzer sample rates. However, los analizadores lógicos Acute can capture lower-level aspects of SGMII such as link status signaling and in-band auto-negotiation. For full serial data capture at 1.25 Gbps, specialized high-speed analyzers or oscilloscopes are typically required.
Por que mi enlace SGMII no se establece?
SGMII link establishment depends on in-band auto-negotiation, which exchanges link parameters (speed, duplex) using a modified Ethernet auto-negotiation mechanism within the serial stream. Common failure causes include reference clock issues, incorrect serializer/deserializer (SerDes) configuration, PCB differential pair impedance mismatch, or incompatible auto-negotiation settings between the MAC and PHY. Verify the reference clock presence and frequency, and check PHY register configuration via MDIO.
Cuantos canales se necesitan para el análisis de SGMII ?
SGMII requires 4 channels for the two differential pairs (TX+, TX-, RX+, RX-). If a reference clock is present, add 1-2 channels. For monitoring the MDIO management interface alongside SGMII, add 2 more channels for MDC and MDIO. Total: 4-8 channels depending on what signals you need to monitor.

Protocolos relacionados

RGMII GMII

¿Necesita ayuda para elegir el instrumento adecuado para su protocolo? Contacte a nuestro equipo de ingeniería.

Ver productos compatibles Contáctenos