QUAD EXCHANGE POWER CONTROLLER.

摘要

A power controller for supplying separately a regulated power source to a plurality of "S" lines and for monitoring line-status conditions on the "S" lines so that each "S" line is controlled independently includes an analog section for delivering power independently to each of the "S" lines and for detecting line-status conditions on the "S" lines. The power controller also includes a microprocessor interface section for communicating with the microprocessor and for controlling the analog section. The analog section is formed of a plurality of output drivers for supplying individually the power to the plurality of "S" lines and line-status detector circuits for sensing line-status conditions on the "S" lines to provide a set of status logic signals for each "S" line. The microprocessor interface section includes an address register for storing a plurality of addresses corresponding to the line-status conditions to be monitored on the "S" lines. Decoder/multiplexers are provided for selecting a particular one of the line-status conditions in response to the addresses so that the same line-status condition for all "S" lines is readable simultaneously by the microprocessor. A data register receives control signals from the microprocessor upon reading of the line status conditions so as to switch off independently each of the output drivers to control power to the "S" lines.