KSZ9031RNX Ver la hoja de datos (PDF) - Micrel

Número de pieza

componentes Descripción

Fabricante

KSZ9031RNX

Gigabit Ethernet Transceiver with RGMII Support

Micrel 

Micrel, Inc.

KSZ9031RNX

Auto-polarity correction is provided for the receive differential pair to automatically swap and fix the incorrect +/– polarity

wiring in the cabling.

Functional Description: 1000Base-T Transceiver

The 1000Base-T transceiver is based-on a mixed-signal/digital-signal processing (DSP) architecture, which includes the

analog front-end, digital channel equalizers, trellis encoders/decoders, echo cancellers, cross-talk cancellers, precision

clock recovery scheme, and power-efficient line drivers.

Figure 2 shows a high-level block diagram of a single channel of the 1000Base-T transceiver for one of the four

differential pairs.

Figure 2. KSZ9031RNX 1000Base-T Transceiver Block Diagram – Single Channel

Analog Echo-Cancellation Circuit

In 1000Base-T mode, the analog echo-cancellation circuit helps to reduce the near-end echo. This analog hybrid circuit

relieves the burden of the ADC and the adaptive equalizer.

This circuit is disabled in 10Base-T/100Base-TX mode.

Automatic Gain Control (AGC)

In 1000Base-T mode, the automatic gain control (AGC) circuit provides initial gain adjustment to boost up the signal level.

This pre-conditioning circuit is used to improve the signal-to-noise ratio of the receive signal.

May 14, 2015

17

Revision 2.2

Share Link: