AX88772 datasheet(25/43 Pages) ASIX

25 / 43 page

ASIX ELECTRONICS CORPORATION

AX88772

USB to 10/100 Fast Ethernet/HomePNA Controller

6.2.1.18 Medium Status Register (1Ah, read only) and Medium Mode Register (1Bh, write only)

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

TFC

RFC

Reserved

SBP

Reserved

AA [7:0] = {PF, JFE, TFC, RFC, EN125, AC, FD, GM}.

BB [7:0] = {Reserved, SM, SBP, JE, PS, RE}.

Bit 0: Please always write 0 to this bit.

PS: Port Speed in MII mode

1: 100 Mbps (default).

0: 10 Mbps.

FD: Full Duplex mode

1: Full Duplex mode (default).

0: Half Duplex mode.

Bit 2: Please always write 1 to this bit.

Bit 3: Please always write 0 to this bit.

RFC: RX Flow Control enable.

1: Enable receiving of pause frame on RX direction during full duplex mode (default).

0: Disabled.

TFC: TX Flow Control enable.

1: Enable transmitting pause frame on TX direction during full duplex mode (default).

0: Disabled.

Bit 6: Please always write 0 to this bit.

PF: Check only “length/type” field for Pause Frame.

1: Enable, i.e., Pause frames are identified only based on L/T filed.

0: Disabled, i.e., Pause frames are identified based on both DA and L/T fields (default).

RE: Receive Enable.

1: Enable RX path of the ASIC.

0: Disabled (default).

SBP: Stop Backpressure.

1: When TFC bit = 1, setting this bit enables backpressure on TX direction “continuously” during RX buffer full

condition in half duplex mode.

0: When TFC bit = 1, setting this bit enable backpressure on TX direction “intermittently” during RX buffer full

condition in half duplex mode (default).

SM: Super Mac support.

1: Enable Super Mac to shorten exponential back-off time during transmit retry.

0: Disabled (default).

6.2.1.19 Monitor Mode Status Register (1Ch, read only)

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

Reserved

RWMP

RWLU

MOM

MOM: Monitor Mode.

1: Enable. All received packets will be checked on DA and CRC but not buffered into memory.

0: Disabled (default).

RWLU: Remote Wakeup trigger by Ethernet Link-up.

1: Enable

0: Disabled (default).

RWMP: Remote Wakeup trigger by Magic Packet.

1: Enable

0: Disabled (default).

US: USB Speed.

1: High speed mode.

0: FS speed mode.

AX88772 Datasheet(PDF) 25 Page - ASIX Electronics Corporation

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