MC68360
Motorola
ATOM1 is an MC68360 RAM-based microcode that provides physical layer ATM functions by converting one or more of the QUICC's serial communication controllers (SCCs) into an ATM cell transmitter and receiver.
Design DocumentNxp
MC68360 ATOM1 ATM Microcode User’s Manual
User manual for ATOM1 microcode, enabling ATM functionality on the MC68360 QUICC communications controller, including cell delineation, CRC-32, and buffer management.
Overview
This technical manual details the ATOM1 microcode implementation for the Motorola MC68360 QUICC communications processor. ATOM1 provides the necessary firmware to support Asynchronous Transfer Mode (ATM) protocol functions via the device's Serial Communication Controllers (SCCs). Key features described include HEC-based cell delineation, AAL Frame Check Sequences using CRC-32, and support for PDH and SDH physical layer signaling. The document provides comprehensive register definitions, SCC parameter RAM maps, and buffer descriptor structures. It also covers performance metrics such as command execution latency, transmit bandwidth reservation, and integration with external Content Addressable Memory (CAM) for header lookup.
Use Cases
- Implementing ATM protocol stacks on MC68360-based communications hardware
- Designing network interfaces for PDH and SDH physical layers
- Developing ATM Adaptation Layer (AAL) frame check and traffic control systems
- Configuring mixed voice and data transmission over ATM connections
Topics
MC68360
ATOM1
ATM microcode
Asynchronous Transfer Mode
QUICC
Serial Communication Controller
Cell Delineation
HEC
CRC-32
Buffer Descriptor
AAL
PDH
Referenced Parts
| MC68360 | Motorola | ATOM1 is an MC68360 RAM-based microcode that provides physical layer ATM functions by converting one or more of the QUICC's serial communication controllers (SCCs) into an ATM cell transmitter and receiver. |