TW255086B - Shared-buffer memory asynchronous transfer mode exchange - Google Patents

Abstract

A re-circulating queue manager of shared-buffer memory asynchronous transfer mode exchange includes: (1) one back-pressure interface which receives back-pressure signal from back stage and stores in register, supplying address generator check, and based on it to decide the pause of output port packet transmittance; When the buffer memory is full, the back-pressure interface send back-pressure signal to front stage; (2) one address generator consisting of a programmable logic array, a queue selector, a queue address pointer file, a state register file and a queue memory; The address generator arranges each input packet to its output queue based on the destination port address of each packet, and the packet reading out sequence of each output queue; The generated address is used to read or write the packet in the shared-buffer memory; And controlling the input interface and output interface based on system timing signal; (3) one timing generator which generates each kind of timing signals needed by system based on system timing and packet start signal.