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RTL8019AS

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

Realtek Semiconductor 

SPECIFICATION

RTL8019AS

2. General Description

The RTL8019AS is a highly integrated Ethernet Controller which offers a simple solution to

implement a Plug and Play NE2000 compatible adapter with full-duplex and power down features.

With the three level power down control features, the RTL8019AS is made to be an ideal choice

of the network device for a GREEN PC system. The full-duplex function enables simultaneously

transmission and reception on the twisted-pair link to a full-duplex Ethernet switching hub. This

feature not only increases the channel bandwidth from 10 to 20 Mbps but also avoids the

performance degrading problem due to the channel contention characteristics of the Ethernet

CSMA/CD protocol. The Microsoft's Plug and Play function can relieve the users from pains of

taking care the adapter's resource configurations such as IRQ, I/O, and memory address, etc.

However, for special applications not to be used as a Plug and Play compatible device, the

RTL8019AS also supports the jumper and proprietary jumperless options.

To offer a fully plug and play solution, the RTL8019AS provides the auto-detect capability

between the integrated 10BaseT transceiver, BNC and AUI interface. Besides, the 10BaseT

transceiver can automatically correct the polarity error on its receiving pair. Furthermore, 8 IRQ

lines and 16 I/O base address options are provided for grand resource configuration flexibility.

The RTL8019AS supports 16k, 32k & 64k byte BROM and fiash memory interface. It also offers

the page mode function which can support up to 4M-byte BROM within only 16k-byte system

memory space. Besides, the BROM disable command is provided to release the BROM memory

space for other system usage (e.g. EMM386, etc.) after the BROM program is loaded.

The RTL8019AS is built in with 16K-byte SRAM in a single chip. It is designed not only to

provide more friendly functions but also to save the effort of SRAM sourcing and inventory.

8019AS.doc

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2001-04-02

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