STE100P datasheet(14/31 Pages) STMICROELECTRONICS

14 / 31 page

STE100P

14/31

11, 10

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reserved

ENRLB

Enable remote loop-back function. 1: enable

0: disable

R/W

ENDCR

Enable DC restoration.

0: disable DC restoration.

1: enable DC restoration.

1R/W

ENRZI

Enable the conversions between NRZ and NRZI.

0: disable the data conversion between NRZ and NRZI.

1: enable the data conversion of NRZI to NRZ in receiving and

NRZ to NRZI in transmitting.

1R/W

EN4B5B

Enable 4B/5B encoder and decoder

0: the 4B/5B encoder and decoder are bypassed

1: the 4B/5B encoder and decoder are enabled..

R/W

ISOTX

Transmit Isolation. When 1, isolate from MII and tx+/-. The bit

will be set to one if the PHY address is set to 00000 at power-

up/reset This bit must be 0 for normal operation

0R/W

4~2

CMODE

Reporting of current operation mode of transceiver.

000: in auto-negotiation

001: 10Base-T half duplex

010: 100Base-TX half duplex

011: reserved

100: reserved

101: 10Base-T full duplex

110: 100Base-TX full duplex

111: isolation, auto-negotiation disable

000

DISMLT

Disable MLT3.

0: the MLT3 encoder and decoder are enabled.

1: the MLT3 encoder and decoder are bypassed.

0R/W

DISCRM

Disable Scramble.

0: the scrambler and de-scrambler is enabled.

1: the scrambler and de-scrambler are disabled.

0R/W

PR20- XMC, XCVR Mode control

15~12

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Reserved

Long Distance mode of 10Base-T.

0: normal squelch level.

1: reduces 10Base-T squelch level for extended cable length.

As the length of the cable increases, so does the current.

0R/W

10~8

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Reserved

Table 5. Register Descriptions (continued)

Bit #

Name

Descriptions

Default Val

RW Type

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