TIMING CONTROL CIRCUIT

摘要

A timing control circuit includes a single chip having a plurality of output ports; a chip selecting circuit having a plurality of control ports connected to the output ports and paths; a signal input circuit; a signal output circuit; and a switching circuit including a plurality of signal channels. The chip selecting circuit generates a selection signal according to a control signal and outputs the selected signal via one of the selected paths. One of the channels is selected when a selection signal is output via the selected channel. When one of the signal channels is selected and there are signals inputted by the signal input circuit via the signal channel, the signals from the signal input circuit are passed to the signal output circuit through the signal channel and the light emitting diode in the signal channel is turned on.

主权项

1. A timing control circuit comprising:
a single chip having a plurality of output ports, to process commands from a computer and generate a corresponding control signal by setting logic level of the output ports; a chip selecting circuit having a plurality of control ports connected to the output ports and a plurality of paths, to generate a select signal according to the control signal and output the select signal via one of the paths; a signal input circuit; a signal output circuit; and a switching circuit comprising a plurality of signal channels connected between the signal input circuit and the signal output circuit, wherein each signal channel comprises a relay and a light emitting diode, each relay comprises a control terminal connected to one of the paths; one of the signal channels is selected when the select signal is output via the signal channel; when one of the signal channels is selected and there are signals inputted by the signal input circuit via the signal channel, the signals from the signal input circuit are passed to the signal output circuit through the signal channel and the light emitting diode in the signal channel is turned on.