D-BUS ADDRESS DETECTING CIRCUIT IN ELECTRONIC EXCHANGES

摘要

The invention detects the obstruction node and its exact address when there is a obstruction in data signals and control signals. The circuit comprises D-BUS sensing section (16) for detecting an error signal on D-bus and operating an obstructing signal, ASTCLK control section (17) for generating clock signal (ASTCLK1) using a control clock (ASTCCK) and a bus control signal (AST*), counter section (18) for decreasing initial values by clock signal (ASTCLK1) and data latch section (19) for latching a data of counter output by obstruction signal.