Fire VT6312 2-Port Physical Layer Chipset Solution

VT6312The VT6312 provides Two-port physical layer function in a cable IEEE 1394-1995 network. Each cable port incorporates two differential line transceivers. The transceivers include circuitry to monitor the line conditions as needed for determining connection status, for initialization and arbitration, and for half duplex packet reception and transmission.

Key Features

» Supports provisions of IEEE 1394-1995 Standard for High Performance Serial Bus and the P1394a 2000
» Full P1394a Supplement Support includes
– Arbitrated short reset
– Enhanced priority arbitration
– Connection debounce
– Multispeed packet concatenation
– Ack accelerated arbitration
– Fly-by concatenation
– Per port disable, suspend, resume, through register write and remote command packet
– Remote access packet
– Boundary node short reset
– No phy_ID wrap past 63
» Integrated 400Mbps 2-port PHY
– Supports two 1394a fully compliant cable ports at 100/200/400Mbps
– Supports IEEE 1394-1995 Standard for High Performance Serial Bus 1.0 and 1394a P2000
– Full 1394a P2000 support
– Logic performs bus initialization and arbitration functions
– 2KV ESD protection
» Provides two 1394a fully compliant cable ports at 100/200/400 Mbit per second and available with one, two ports
» Single 3.3 V power supply
» Logic performs bus initialization and arbitration functions
» Encode and decode functions included for data-strobe bit-level encoding
» Incoming data resynchronized to local clock.
» Data interface to Link-Layer Controller provided through 2/4/8 parallel lines at 49.152 Symbol/Sec
» 24.576 MHz crystal oscillator provides TX/RX data at 100/200/400 Mbps and Link-Layer Controller clock at 49.152 MHz.
» Cable power presence monitoring
» Programmable node power class information for system power management
» Compliant with Open HCI requirements
» Separate cable bias (TPBIAS) and driver termination voltage supply for each port
» Fully interoperable with IEEE Std1394-1995 devices
» Cable ports monitor line conditions for active connection to remote node
» Automatic power down inactive circuit and logic for low power application
» Self power up reset
» 48-pin LQFP package
» Automatic configuration to single-port and two-port applications; the unused ports are power down automatically
» Easy configured as a repeater

Note: No driver is required for devices running in Windows® 98 2nd Edition or later. For Linux based OS, please refer to for further details.

VIA Technologies, Inc.