The ATM Cell Processor (MC92501) is an Asynchronous Transfer Mode (ATM) layer device composed of dedicated high-performance ingress and egress cell processors combined with UTOPIA Level 2-compliant physical (PHY) and switch interface ports (see Block Diagram). The MC92501 is a second generation ATM cell processor in Motorolas 92500 series. This document provides information on the new features offered by the second generation ATM cell processor. This document, combined with MC92500/D, provides the complete specication for the ATM cell processor.