TMI TAMARACK TC9021, TC9020 Datasheet

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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 serve rs and high-end workstations. Of fering two gigabits pe r 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 dat a 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 th e 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-effect ive migration f rom
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 sup port 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 t o 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.

e-mail:[e-mail]

website:www.tmi.com.tw

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Interrupt Coalescence

While receiving frames, the TC9021/TC9020 can be configured to operate with adaptive interrupts to maximize the
host CPU efficiency. For heavy traffic, the TC9021/TC9020 issues a single interrupt for a series of back-to-back
receive frames which reduces CPU interrupt overhead significantly. For light traffic, th e TC9021/TC902 issues an
interrupt when frame arrives to minimize the latency. On the transmit side, the frequency of interrupt is
programmable on a frame by frame basis. An “interrupt-less” transmit operation is provided to further reduce
interrupt to the host CPU.

IEEE 802.1p Priority Support

The TC9021/TC9020 supports transmit packet priorit y queuing, allowing the host to insert higher priority frames
into the front of the transmit queue for lower latency transfer. The TC9021/TC9020 also examines the IEEE standard
priority field of appropriately tagged receive frames and generates a host system interrupt according to a user
programmable priority threshold. This mechanism provides immediate notification to the host of high priority frame
arrivals.

IEEE 802.1Q VLAN Support

The TC9021/TC9020 can be programmed to insert VLAN tags automatically into outgoing frames on a global or
individual frame basis. On the receive side, the TC9021/TC9020 examines all incoming frames fo r 802.1Q compliant
VLAN tags. Once a VLAN tag is detected, the TC9021/TC9020 will optionally remove the VLAN tag befo re uploading
the frame into system memory. The TC9021/TC9020 also offers a receive filtering mode based on either a VLAN ID
exact or hashed match.

Jumbo Frame Support

The TC9021/TC9020 can be configured to use a maximum frame size of up to 9,018 bytes. This Jumbo Frame size
reduces packet-processing overhead o n the host CPU as much as 85 percent. In systems that are CPU bound, it can
provide for layer 4 throughput increases of greater than 100%.

Network Management

The TC9021/TC9020 implements management statistic counters based on IEEE 802.3 MIB and IETF RMON statistic
register sets, providing a powerful management capability

Power Management

The TC9021/TC9020 is fully compliant with PCI Power Management v1.1 and ACPI Power Management
specification v1.0. It implements multiple wakeup eve nts including Wakeup packets, Magic Packets, and Link Stat us
change. The TC9021/TC9020 also supports legacy Wake-On-LAN and Magic packet power management
mechanisms.

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e-mail:[e-mail]

website:www.tmi.com.tw