LAN9312 datasheet(83/458 Pages) SMSC

Il numero della parte	LAN9312

Spiegazioni elettronici	High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

PDF	458 Pages

Scroll/Zoom	100%

Produttore elettronici	SMSC [SMSC Corporation]

Homepage	http://www.smsc.com

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High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

Datasheet

SMSC LAN9312

Revision 1.2 (04-08-08)

DATASHEET

7.2

Port 1 & 2 PHYs

Functionally, each PHY can be divided into the following sections:

100BASE-TX Transmit and 100BASE-TX Receive

10BASE-T Transmit and 10BASE-T Receive

PHY Auto-negotiation

HP Auto-MDIX

MII MAC Interface

PHY Management Control

Note 7.1

Because the Port 1 PHY and Port 2 PHY are functionally identical, this section will describe

them as the “Port x PHY”, or simply “PHY”. Wherever a lowercase “x” has been appended

to a port or signal name, it can be replaced with “1” or “2” to indicate the Port 1 or Port 2

PHY respectively. All references to “PHY” in this section can be used interchangeably for

both the Port 1 & 2 PHYs. This nomenclature excludes the Virtual PHY.

A block diagram of the Port x PHYs main components can be seen in Figure 7.1.

Figure 7.1 Port x PHY Block Diagram

HP Auto-MDIX

TXPx/TXNx

RXPx/RXNx

To External

Port x Ethernet Pins

10/100

Transmitter

10/100

Reciever

MII

MAC

Interface

MII

MDIO

Auto-

Negotiation

To Port x

Switch Fabric MAC

To Host MAC

LEDs

PLL

PHY Management

Control

Registers

From

System Clocks Controller

To GPIO/LED

Controller

Interrupts

To System

Interrupt Controller

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