LAN91C111 datasheet(69/125 Pages) MICROCHIP

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LAN91C111

DS00002276A-page 70

 2011-2016 Microchip Technology Inc.

9.1.8

DPLX - DUPLEX MODE

When Auto-Negotiation is disabled this bit can be used to manually select the link duplex state. Writing a ‘1’ to this bit

selects full duplex while a ‘0’ selects half duplex.

When Auto-Negotiation is enabled reading or writing this bit has no effect.

9.1.9

COLTST - COLLISION TEST

Setting a ‘1’ allows for testing of the MII COL signal. ‘0’ allows normal operation.

Reserved: Reserved, Must be 0 for Proper Operation

9.2

9.2.1

CAP_T4 - 100BASE-T4 CAPABLE

‘1’ Indicates 100Base-T4 capable PHY, ‘0’ not capable.

9.2.2

CAP_TXF - 100BASE-TX FULL DUPLEX CAPABLE

‘1’ Indicates 100Base-X full duplex capable PHY, ‘0’ not capable.

9.2.3

CAP_TXH - 100BASE-TX HALF DUPLEX CAPABLE

‘1’ Indicates 100Base-X alf duplex capable PHY, ‘0’ not capable.

9.2.4

CAP_TF - 10BASE-T FULL DUPLEX CAPABLE

‘1’ Indicates 10Mbps full duplex capable PHY, ‘0’ not capable.

9.2.5

CAP_TH - 10BASE-T HALF DUPLEX CAPABLE

‘1’ Indicates 10Mbps half duplex capable PHY, ‘0’ not capable.

Reserved: Reserved, Must be 0 for Proper Operation.

9.2.6

CAP_SUPR - MI PREAMBLE SUPPRESSION CAPABLE

‘1’ indicates the PHY is able to receive management frames even if not preceded by a preamble. ‘0’ when it is not able.

9.2.7

ANEG_ACK - AUTO-NEGOTIATION ACKNOWLEDGMENT

When read as ‘1’ indicate ANEG has been completed and that contents in registers 4,5,6 and 7 are valid. ‘0’ means

ANEG has not completed and contents in registers 4,5,6 and 7 are meaningless. The PHY returns zero if ANEG is dis-

abled.

9.2.8

REM_FLT- REMOTE FAULT DETECT

‘1’ indicates a Remote Fault. Latches the ‘1’ condition and is cleared by reading this register or resetting the PHY.

CAP_T4

CAP_TXF

CAP_TXH

CAP_TF

CAP_TH

Reserved

Reserved.

Reserved

RRRRRRRR

Reserved

CAP_SUPR

ANEG_ACK

REM_FLT

CAP_ANEG

LINK

JAB

EXREG

R, LH

R, LL

R, LH

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