AN983 datasheet(19/91 Pages) ETC

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AN983B

PCI/miPCI Fast Ethernet Controller with integrated PHY

7. REGISTERS AND DESCRIPTORS DESCRIPTION

There are three kinds of registers designed for AN983B. They are AN983B configuration

registers, PCI control/status registers, and Transceiver control/status registers.

The AN983B configuration registers are used to initialize and configure the AN983B for

identifying and querying the AN983B.

The PCI control/status registers are used to communicate between host and AN983B. Host can

initialize, control, and read the status of the AN983B through the mapped I/O or memory address

space.

Regarding the registers of transceiver portion of AN983B, it includes 7 basic registers which are

defined according to the clause 22 “Reconciliation Sub-layer and Media Independent Interface”

and clause 28 “Physical Layer link signaling for 10 Mb/s and 100 Mb/s Auto-Negotiation on

twisted pair” of IEEE802.3u standard. The AN983B also provides receive and transmit

descriptors for packet buffering and management. These descriptors are described in the

following section

ADMtek Inc.

www.admtek.com.tw

Rev. 1.8

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