ML2652 Просмотр технического описания (PDF) - Micro Linear Corporation

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ML2652

10Base-T Physical Interface Chip

Micro Linear Corporation 

ML2653 BLOCK DIAGRAM

ML2652/ML2653

TxC

TxE

TxD

COL

LPBK

RxC

RxE

RxD

CS0 CS1 CS2 FD VCC VCC GND GND

DATA MANCHESTER

ENCODER

JABBER

DETECT

ENABLE

LINK

RTX

PULSE

XMT

CURRENT

Tx+

WAVEFORM DRIVEN XMT

GEN & LPF

OUTPUT

Tx–

DRIVER

CONTROLLER COLLISION

INTERFACE

DATA MANCHESTER

DECODER

COLLISION

DETECT

RECEIVER

Rx+

RECEIVE

LPF

Rx–

ENABLE

RSL

CLK

OSC

LEDS

RPOL XMT/RCV

LTP

PIN DESCRIPTION

NAME FUNCTION

VCC Positive supply. +5V

GND Ground. 0 volts. All inputs and outputs referenced

to this point.

CLK Clock input. There must be either a 20 MHz

crystal or a 20 MHz clock between this pin

and GND.

Tx+ Transmit positive twisted pair output. This output

is a current source that drives the twisted pair

cable through a pulse transformer.

Tx– Transmit negative twisted pair output. This output

is a current source that drives the twisted pair

cable through a pulse transformer.

Rx+ Receive positive twisted pair input. This input

receives data from the twisted pair cable through

a pulse transformer.

Rx– Receive negative twisted pair input. This input

receives data from the twisted pair cable through

a pulse transformer.

DO+ AUI positive transmit output. AUI transmit data

output to optional external transceiver.

DO– AUI negative transmit output. AUI transmit data

output to optional external transceiver.

DI+ AUI positive receive data input from optional

external transceiver.

NAME FUNCTION

DI– AUI negative receive data input from optional

external transceiver.

CI+ AUI positive collision input from optional external

transceiver.

CI– AUI negative collision input from optional

external transceiver.

RTX Transmit current set. An external resistor between

this pin and GND programs the absolute value of

output current on Tx±.

TxC Transmit clock output. Digital output which clocks

the transmit data (TxD) into the device from the

controller.

TxD Transmit data input. Digital input which contains

transmit data from the controller.

TxE Transmit enable input. Digital input from the

controller that indicates when the transmit data

(TxD) is valid.

COL

Collision output Digital output to the controller

which indicates when a collision condition is

present.

RxC Receive clock output. Digital output which clocks

receive data (RxD) from the device into the

controller.

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