KSZ8051MLL View Datasheet(PDF) - Micrel

Part Name

Description

Manufacturer

KSZ8051MLL

10Base-T/100Base-TX Physical Layer Transceiver

Micrel 

Micrel, Inc.

KSZ8051MLL

Figure 1. Auto-Negotiation Flow Chart

MII Data Interface

The Media Independent Interface (MII) is compliant with the IEEE 802.3 Specification. It provides a common interface

between MII PHYs and MACs, and has the following key characteristics:

• Pin count is 15 pins (6 pins for data transmission, 7 pins for data reception, and 2 pins for carrier and collision

indication).

• 10Mbps and 100Mbps data rates are supported at both half and full duplex.

• Data transmission and reception are independent and belong to separate signal groups.

• Transmit data and receive data are each 4-bit wide, a nibble.

By default, the KSZ8051MLL is configured to MII mode after it is powered up or hardware reset with the following:

• A 25MHz crystal connected to XI, XO (pins 15, 14), or an external 25MHz clock source (oscillator) connected to

XI.

• The CONFIG[2:0] strapping pins (pins 27, 41, 40) set to ‘000’ (default setting).

July 2010

16

M9999-071210-1.0

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