Connection apparatus for interactively accessing an electronic d

Details Connection apparatus for interactively accessing an electronic d Connection apparatus for interactively accessing an electronic d

1989-01-18

1990-03-27

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

G01R 3102

Patent

active

049124013

ABSTRACT:
A connection apparatus for interactively accessing over signal paths of minimum length the signals by which an electronic device with a large number of pins communicates with its environment through a pin grid array socket includes two printed circuit boards, each having a pin grid array socket or a plurality of individual receptacles for pins arranged in a pin grid array pattern, stacked vertically with their pin grid arrays vertically aligned. Each of these circuit boards has a receptacle side on top and a partial array of associated pins on the bottom. The total number of locations in these pin grid arrays exceeds the number of pins on the device, so that signals may be interrupted by the absence of a pin on the bottom of the top board, rerouted for interactive monitoring, sent to the bottom board by a pin in a location not used by the electronic device, and rerouted back to its original location in the pin grid array by runs on the bottom board so that it may be presented to a pin grid array socket in the device's environment by a pin in that location on the bottom of the bottom board. Circuitry for manipulating or emulating the interrupted signals can be placed on the top board where it is very close to the electronic device.

REFERENCES:
Intel, ICE-386 In-Circuit Emulator for the 80386 data sheet, Oct. '87, pp. 1-12.

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