RTL8019AS Ver la hoja de datos (PDF) - Realtek Semiconductor

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RTL8019AS

Realtek Full-Duplex Ethernet Controller with Plug and Play Function (RealPNP)

Realtek Semiconductor 

SPECIFICATION

RTL8019AS

PSTOP:

Page Stop Register (02H; Type=W in Page0, Type=R in Page2)

The Page Stop register sets the stop page address of the receive buffer ring. In 8 bit

mode the PSTOP register should not exceed to 0x60, in 16 bit mode the PSTOP

register should not exceed to 0x80.

BNRY:

TPSR:

Boundary Register (03H; Type=R/W in Page0)

This register is used to prevent overwrite of the receive buffer ring. It is typically

used as a pointer indicating the last receive buffer page the host has read.

Transmit Page Start Register (04H; Type=W in Page0)

This register sets the start page address of the packet to the transmitted.

TBCR0,1: Transmit Byte Count Registers (05H & 06H; Type=W in Page0)

These two registers set the byte counts of the packet to be transmitted.

NCR:

FIFO:

Number of Collisions Register (05H; Type=R in Page0)

The register records the number of collisions a node experiences during a packet

transmission.

First In First Out Register (06H; Type=R in Page0)

This register allows the host to examine the contents of the FIFO after loopback.

CRDA0, 1: Current Remote DMA Address registers (08H & 09H; Type=R in Page0)

These two registers contain the current address of remote DMA.

RSAR0,1: Remote Start Address Registers (08H & 09H; Type=W in Page0)

These two registers set the start address of remote DMA.

RBCR0,1: Remote Byte Count Registers (0AH & 0BH; Type=W in Page0)

These two registers se the data byte counts of remote DMA.

CNTR0: Frame Alignment Error Tally Counter Register (0DH; Type=R in Page0)

CNTR1: CRC Error Tally Counter Register (0EH; Type=R in Page0)

CNTR2: Missed Packet Tally Counter Register (0FH; Type=R in Page0)

PAR0-5:

Physical Address Registers (01H - 06H; Type=R/W in Page1)

These registers contain my Ethernet node address and are used to compare the

destination adderss of incoming packets for acceptation or rejection.

CURR:

Current Page Register (07H; Type=R/W in Page1)

This register points to the page address of the first receive buffer page to be used for

a packet reception.

MAR0-7: Multicast Address Register (08H - 0FH; Type=R/W in Page1)

These registers provide filtering bits of multicast addresses hashed by the CRC logic.

8019AS.doc

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2001-04-02

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