AV1890Y-14 View Datasheet(PDF) - Integrated Circuit Systems

Part Name

Description

Manufacturer

AV1890Y-14

10Base-T/100Base-TX Integrated PHYceiver™

Integrated Circuit Systems 

ICS1890

10M Serial Interface

The 10M Serial Interface is an alternative serial interface

between the PHY and MAC/Repeater than the standard MII

Data interface. The 10M Serial interface provides the same

functionality, but with a serial data stream at a 10 MHz clock

rate.

This interface is selected by setting the MII/SI pin to STREAM

INTERFACE mode and by setting the 10/100SEL pin to 10

mode.

The 10M Serial Interface operation consists of a nine signal

interface: 10TCLK, 10TXEN, 10TD 10RCLK, 10RXDV, 10RD,

10CRS, 10COL, and LSTA.

Data is exchanged between the MAC and PHY serially at a 10

MHz clock rate.

Since only the 10M Serial Interface or the MII Interface is

active at once, it is possible to share the MII Data interface

pins for 10M Serial Interface functionality.

The pins have the following mapping:

MII

10M Serial

TXCLK

TXEN

TXER

TXD3

TXD2

TXD1

TXD0

10TCLK

10TXEN

(1)

10TD

RXCLK

RXDV

RXER

RXD3

RXD2

RXD1

RXD0

10RCLK

10RXDV

(1)

10RD

CRS

COL

LSTA

10CRS

10COL

LSTA

Link Pulse Interface

The Link Pulse Interface is an alternative control interface

between the PHY and MAC/Repeater than the standard MII

Data interface. The Link Pulse provides detailed control over

the Auto-Negotiation process.

This interface is selected by setting the MII/SI pin to STREAM

INTERFACE mode, by setting the 10/100SEL pin to 10

mode, and by setting the 10/LP pin to LP mode.

The Link Pulse Interface consists of a five signal interface:

LTCLK, LPTX, LRCLK, LPRX, SD.

Since only the Link Pulse Interface or the MII Interface is

active at once, it is possible to share the MII Data interface

pins for Link Pulse Interface functionality.

The pins have the following mapping:

MII

Link Pulse

TXCLK

TXEN

TXER

TXD3

TXD2

TXD1

TXD0

LTCLK

LPTX

RXCLK

RXDV

RXER

RXD3

RXD2

RXD1

RXD0

LRCLK

LPRX

CRS

COL

LSTA

SD

Other mode configuration pins behave identically

regardless of which data interface is used.

(1) Error generation and detection is not supported by

10Base-T.

Other mode configuration pins behave identically regardless

of which data interface is used.

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