■DESCRIPTION

The MB86612 is 1394 serial bus controller exclusively for MPEG and DVC data transfer, compatible with the IEEE 1394 “FireWire” standard (IEEE Standard 1394-1995). Two built-in ports plus a differential transceiver and comparator are provided to enable formation of networks in a 1394 cable environment. The MB86612 supports s100 data transfer speeds. By integrating the physical layer and link layer on one chip, The MB86612 is designed to reduce mounting area as well as power consumption. The MB86612 has an exclusive data port for isochronous transfer, provides automatic packetizing and separation of header and data units, and is optimized for continuity of transfer processing. The MB86612 supports MPEG and DVC AV/C protocols, and includes the necessary built-in automatic operations and CSR’s for providing the necessary operations for MPEG and DVC data transfer.

■FEATURES

• Compatible with IEEE 1394 high-performance serial bus standards

• Physical layer and link layer integrated on one chip

• 2 cable ports

• Supports s100 transfer speed (98.304 Mbit/sec)

• 3.3V single power supply operation

• Built-in PLL (for crystal oscillator) for internal clock signal generation

• Power saving modes

1) Forced sleep mode at instruction from MPU

2) Automatic sleep mode for non-connected ports

• Header and data units automatically separated at receiving and automatic packetizing for sending

• Supports cycle master functions