Revision 0.2 March 10, 2000

-2-

Overview

Technologies, Inc.

We Connect

We Connect

The VT6305 IEEE 1394 Open HCI Link Controller provides high performance serial connectivity. It implements the Link layer

for IEEE 1394.A release v1.0 and is compliant with Open HCI with DMA engine support for high performance data transfer. It

has a PCI host bus interface.

The VT6305 supports 100, 200 and 400 Mbits/sec transmission. Depending on transmission speed, the Link / PHY connection

is provided through a 2- / 4- / 8-bit interface operating at 50 MHz. The VT6305 services two types of data packets: asynchronous

and isochronous (real time). The 1394 link core performs arbitration requesting, packet generation and checking, and bus cycle

master operations. It also has root node capability and performs cycle and retry operations.

The VT6305 is ready to provide industry-standard IEEE 1394 peripheral connections for desktop and mobile PC platforms.

Support for the VT6305 will be built into Microsoft Windows 98 (Memphis) and Windows NT 5.0.

PCI 2.1 Host Interface

DMA

Tx/Rx FIFO

Iso/Asy

SWAP

CRC

Checker

Cycle

Monitor

Cycle

Timer

CRC

Generator

Link/PHY Interface

Figure 1. VT6305 Chip Block Diagram