AX88196BLF datasheet(53/86 Pages) ASIX

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ASIX ELECTRONICS CORPORATION

AX88196BLF

5.1.71 Flow Control Register (FCR)

Offset 1AH (Read/Write)

Field

Name

Description (Default = 07h)

FLWC

Flow-control

0: Flow-control disable (Default)

1: Flow-control enable

BPEN

Back Pressure in half-duplex flow-control (AX88196B will ignore this bit when running at

full-duplex mode)

0: Back Pressure disable (Default)

1: Back Pressure enable

5:0

HWPC

High Water free Page Count. Default value is 7 (7 * 256 = 1792 bytes).

5.1.72 MAC Configure Register (MCR)

Offset 1BH (Read/Write)

Field

Name

Description

DUPX

MAC duplex mode setting

When read, this bit is indicates the real duplex setting in MAC operation.

0: half-duplex

1: full-duplex

When write, this duplex setting was wire or with TCR bit-7. Each one goes high then

configures MAC as full-duplex mode. AX88196B will ignore this bit and TCR bit-7 when

using internal PHY.

BPLE

Back-pressure leakage enable when continuous of collision N times.

N number is reference register 17H of Back-pressure Jam Limit count.

0: Allow flow-control leakage to avoid HUB port going partition state due to too many of

collision (Default)

1: No flow-control leakage

BBTC

Back-To-Back Transmission Control:

0: Disable (Default)

1: Enable Back-To-Back Transmission, Host can continue set TXP without check transmit

completed

Host can ignore Number of Collisions Register (NCR)

MPSEL

Media Select by Program

0: internal PHY is selected (Default)

1: external MII PHY is selected.

VLANE

VLAN enable

0: No supported VLAN frame tagged (Default)

1: Only accept Tag frames. AX88196B will reject packet if Tag x8100 and VID not match

whit setting by host. Null VID (VID = 0) is acceptable.

CPTEFF

Capture effect.

0: always write low (Default)

1: for MAC test only. Force first collision of back off is 2 slot-time and second collision of

back off is 0 slot time. Others as normal.

SPMAC

Super MAC.

0: always write low (Default)

1: for MAC test only. Back-off only 0 ~ 3 slot-time

ZEROBF Zero Back Off Time.

0: always write low (Default)

1: for MAC test only. Back Off Time always zeros.

AX88196BLF Datasheet(PDF) 53 Page - ASIX Electronics Corporation

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