Apparatus for dual serial and parallel port connections for comp

Details Apparatus for dual serial and parallel port connections for comp Apparatus for dual serial and parallel port connections for comp

1994-11-30

1998-03-03

Teska, Kevin J.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

395891, 395893, 395831, 395834, 361728, 361775, G06F 300, G06F 3023

Patent

active

057245541

ABSTRACT:
A 25-pin cable socket has serial pins and parallel pins. Pins 18 through 25 are at ground level only if a parallel cable is inserted in the socket. Serial communication lines are provided to a serial controller and parallel communication lines are provided to a parallel controller. A OR is connected to the pins 18 through 25. A switch is connected to the output of the OR. If ground is sensed at the pins 18 through 25, the OR output is asserted causing the switch to be activated to connect the parallel pins associated with parallel operation to the parallel communication lines. If ground is not sensed at the pins 18 through 25 the switch is deactivated to connect the serial pins associated with serial operation to the serial communication lines.

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