AN983 datasheet(32/91 Pages) ETC

32 / 91 page

AN983B

PCI/miPCI Fast Ethernet Controller with integrated PHY

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Reserved

GPTT

General Purpose Timer Time-out, base on CSR11 timer

RO/LH*

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Reserved

RWT

Receive Watchdog Time-out, based on CSR15 watchdog timer

RO/LH*

RPS

Receive Process Stopped, receive state = stop

RO/LH*

RDU

Receive Descriptor Unavailable

1: while the next receive descriptor can’t be applied by

AN983B. The receive process is suspended in this situation.

To restart the receive process, the ownership bit of next

receive descriptor should be set to AN983B and a receive poll

demand command should be issued (or a new recognized

frame is received, if the receive poll demand is not issued).

RO/LH*

RCI

Receive Completed Interrupt

1: while a frame reception is completed.

RO/LH*

TUF

Transmit Under-Flow

1: while the transmit FIFO had an under-flow condition

happened during transmitting. The transmit process will

enter the suspended state and report the under-flow error

on bit1 of TDES0.

RO/LH*

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Reserved

TJT

Transmit Jabber Timer Time-out

1: while the transmit jabber timer expired. The transmit

processor will enter the stop state and the transmit jabber

time-out flag of bit 14 of TDES0 will be asserted.

RO/LH*

TDU

Transmit Descriptor Unavailable

1: while the next transmit descriptor can’t be applied by

AN983B. The transmission process is suspended in this

situation. To restart the transmission process, the ownership

bit of next transmit descriptor should be set to AN983B and if

the transmit automatic polling is not enabled then a transmit

poll demand command should be issued.

RO/LH*

TPS

Transmit Process Stopped.

1: while transmit state = stop

RO/LH*

TCI

Transmit Completed Interrupt.

1: means a frame transmission is completed while bit 31 of

TDES1 is asserted in the first transmit descriptor of the

frame.

RO/LH*

LH = High Latching and cleared by writing 1.

CSR6 (offset = 30h), NAR - Network access register

Bit #

Name

Descriptions

Default Val RW Type

ADMtek Inc.

www.admtek.com.tw

Rev. 1.8

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