T

T

C

9

0

2

1

T

C

9

0

2

0

e-mail:service@tmi.com.tw

website:www.tmi.com.tw

Features

❑

IEEE 802.3z compliant MAC supporting full wire speed

at 1Gbps

❑

1000Mbps, 100Mbps, and 10Mbps triple speed support

❑

GMII, MII or TBI interface with integrated 1000BASE-X

PCS with Auto-Negotiation

❑

Half duplex carrier extension and packet bursting

❑

Scatter/gather DMA capable of 1Gbps transaction

❑

32/64-bit PCI bus support--- TC9021

32-bit PCI bus support --- TC9020

❑

TCP/UDP/IP checksum offloading

❑

Minimize interrupts

❑

Supports “interrupt-less” transmit operation

❑

Support for IEEE 802.1p prioritizing via priority queuing

and interrupts

❑

Extensive IEEE 802.1Q VLAN support

❑

Jumbo frame support

❑

Provides a variety of flexible receive filtering modes,

including VLAN, IP multicast, and hash table

❑

Flash ROM interface for remote network boot

❑

ACPI and wake On LAN support

❑

Windows NT 4.0, Windows 9x, Windows 2000, Novell

Netware 4.x/5.x, Linux 2.x

❑

Low power 2.5/3.3V CMOS design with 5V tolerant I/O

❑

0.25um CMOS technology

❑

208-pin PQFP

Functional Description

The TC9021/TC9020 is part of a new generation of high performance, host-optimized network interface cards

designed for mission critical systems such as servers and high-end workstations. Offering two gigabits per second of

aggregate bandwidth, the TC9021/TC9020 optimizes performance while minimizing network overhead on the host

system. Compared to leading Fast Ethernet solutions, the TC9021/TC9020 transfers data at less than one tenth of

the host CPU utilization rate.

IEEE 802.3z Gigabit Ethernet MAC

The TC9021/TC9020 implements IEEE 802.3z half duplex functions such as Carrier Extension and Packet Bursting.

In full duplex mode, the TC9021/TC9020 implements both symmetrical and asymmetrical flow control via IEEE

802.3x PAUSE MAC Control frames. PAUSE frames can be automatically generated by the TC9021/TC9020

according to programmable flow control thresholds within the on-chip receive FIFO. The TC9021/TC9020 MAC has

been carefully implemented to ensure full wire speed at 1Gbps with 96-bit transmit and 64-bit receive inter-frame

spacing.

GMII, MII and TBI Interface

The TC9021/TC9020 implements both a GMII and MII interface, which offers a simple, cost-effective migration from

Fast Ethernet networks to high-speed Gigabit Ethernet networks over existing Category 5 cabling. For fiber optics

applications, the TC9021/TC9020 implements an IEEE 802.3z 1000BASE-X Physical Coding Sublayer (PCS). The

PCS includes an 8B10B encoder and decoder, Auto-negotiation, and Ten Bit Interface (TBI). With the industry

standard SERDES devices, the TC9021/TC9020 allows for gigabit optical link connections to the host system.

32/64-bit, 33/66MHz PCI Bus

The only one difference between the TC9021 and the TC9020 is the PCI bus width. The TC9020 can only be used in

32-bit PCI bus and The TC9021can be directly interface to either 32-bit or 64-bit bus. Advanced PCI commands, such

as Write and Invalidate, Read Line, and Read Multiple, are also implemented to further improve system

performance.

Bus Master Dual Channel DMA

The TC9021/TC9020 implements independent scatter/gather DMA engines to support full duplex Gigabit Ethernet

connectivity. These two DMA engines are capable of accessing data on any byte boundary and moving data to and

from discontiguous memory locations. This capability eliminates CPU-intensive data copying. Furthermore, each

DMA engine has been carefully designed to sustain well over 1 gigabit per second of throughput across a PCI bus.

This ensures that the TC9021/TC9020 will not be a bottleneck in high performance data networking applications.

Protocol Offloading

The TC9021/TC9020 also off-loads network protocol tasks from the host CPU. It generates TCP, UDP and IP

checksum values for outgoing frames and verifies the checksum value on incoming frames. Ethernet MAC frame CRC

calculation is also implemented on-chip.