FEATURES

• Supplies the functions of the TC (Transmission Convergence) sublayer recommended by the ATM Forum and

ITU-T.

• Supports the concatenation frame of 2.4 Gbps SONET STS-48c/SDH STM-16c.

• ATM layer interface

• 32-bit, 104-MHz LVTTL FIFO interface

• 15-cell transmit/receive FIFO

• Supports 52-byte/56-byte cell formats.

• Prefixes one-word TAG area to receive cell.

• Circuit side interface

• 16-bit PECL level I/O

• Either of two modes can be selected for CPU interface

• 16-bit data bus

• Intel-compatible mode [RD, WR, RDY-type]/Motorola-compatible mode [DS, R/W, ACK-type]

• Supports two types of overhead interfaces (that can access all overhead areas).

• Incorporates overhead byte insert/drop registers.

• Incorporates dedicated overhead byte insert/extract interfaces.