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RTL8101

REALTEK SINGLE CHIP FAST ETHERNET CONTROLLER AND MC’97 CONTROLLER WITH POWER MANAGEMENT

Realtek Semiconductor 

RTL8101L

2. General Description

The Realtek RTL8101L is a highly integrated and cost-effective single-chip Fast Ethernet controller that provides 32-bit

performance, PCI bus master capability, and full compliance with IEEE 802.3u 100Base-TX specifications and IEEE 802.3x Full

Duplex Flow Control. It also supports the Advanced Configuration Power management Interface (ACPI), PCI power management

for modern operating systems that are capable of Operating System Directed Power Management (OSPM) to achieve the most

efficient power management possible. The RTL8101L no longer supports CardBus mode as RTL8139C does.

In addition to the ACPI feature, the RTL8101L also supports remote wake-up (including AMD Magic Packet, LinkChg, and

Microsoft® wake-up frame) in both ACPI and APM environments. The RTL8101L is capable of performing an internal reset

through the application of auxiliary power. When auxiliary power is applied and the main power remains off, the RTL8101L is

ready and waiting for the Magic Packet or Link Change to wake the system up. Also, the LWAKE pin provides 4 different output

signals including active high, active low, positive pulse, and negative pulse. The versatility of the RTL8101L LWAKE pin

provides motherboards with Wake-On-LAN (WOL) functionality.

The RTL8101L also supports Analog Auto-Power-down, that is, the analog part of the RTL8101L can be shut down temporarily

according to user requirements or when the RTL8101L is in a power down state with the wakeup function disabled. In addition,

when the analog part is shut down and the IsolateB pin is low (i.e. the main power is off), then both the analog and digital parts stop

functioning and the power consumption of the RTL8101L will be negligible. The RTL8101L also supports an auxiliary power

auto-detect function, and will auto-configure related bits of their own PCI power management registers in PCI configuration

space.

PCI Vital Product Data (VPD) is also supported to provide the information that uniquely identifies hardware (i.e., the OEM brand

name of RTL8101L LAN card). The information may consist of part number, serial number, and other detailed information.

To provide cost down support, the RTL8101L is capable of using a 25MHz crystal or OSC as its internal clock source.

The RTL8101L keeps network maintenance costs low and eliminates usage barriers. It is the easiest way to upgrade a network

from 10 to 100Mbps. It also supports full-duplex operation, making 200Mbps bandwidth possible at no additional cost. To

improve compatibility with other brands’ products, the RTL8101L is also capable of receiving packets with InterFrameGap no

less than 40 Bit-Time. The RTL8101L is highly integrated and requires no “glue” logic or external memory.

The RTL8101L includes a PCI and Expansion Memory Share Interface (Realtek patent) for a boot ROM and can be used in

diskless workstations, providing maximum network security and ease of management.

2003-05-28

4

Rev.1.3

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