RTL8029AS Ver la hoja de datos (PDF) - Realtek Semiconductor

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RTL8029AS

Realtek PCI Full-Duplex Ethernet Controller with built-in SRAM

Realtek Semiconductor 

RTL8029AS Preliminary

PIFR: Programming InterFace Register (09H; Type=R)

The Programming interface register is an 8-bit register that identifies the programming interface of

RTL8029AS controller. PCI doesn't define any other specific register level programming interface

for network devices. So PIFR = 00H.

SCR: Sub-Class Register (0AH; Type=R)

The Sub-class register is an 8-bit register that identifies specially the function of the RTL8029AS

controller. SCR = 00H indicates that the RTL8029AS controller is an Ethernet controller.

BCR: Base-Class Register (0BH; Type=R)

The Base-class register is an 8-bit register that broadly classifies the function of the RTL8029AS

controller. BCR = 02H indicates that the RTL8029AS controller is a network controller.

HTR: Header Type Register (0EH; Type=R)

The header type register is an 8-bit register that describes the layout of bytes 10H through 3FH in

configuration space and also whether or not the device contains multiple functions. HTR = 00H

Bit

Symbol

Description

7

FUNC

single/multi FUNCtion. Read as 0, write operation has no effect.

0 : single function device

1: multiple functions device

The RTL8029AS controller is a single function device

6-0

LAYOUT PCI configuration space layout. These bits specify the layout of bytes 10H

through 3FH. One encoding, 00H is defined and specifies the layout show in

section 5.2.1. Read as 0, write operation has no effect.

LTR: Latency Timer Register (0DH; Type=R)

This register is an 8-bit register. LTR = 00H indicates when the RTL8029AS controller is

preempted, it will release the bus immediately after finishing the current data transfer.

BAR: Base Address Register (13-10H; Type=R/W except Bit4-0=R)

The Base Address register is a 32-bit register that determines the I/O space mapping of the

RTL8029AS controller.

Bit

Symbol

Description

31-5

BAR31-5 These bits are used to set I/O base address for I/O operation.

4-2

IOSIZE These bits indicate how many I/O spaces to be used. Read as 0, write operation

has no effect.

1

-

Reserved area. Read as 0, write operation has no effect.

0

IOIN

I/O space INdicator. Read as 1, write operation has no effect. Indicating that the

base address is an I/O base address.

LS009.0

23

1997.01.16

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