Computer interface adapter for supporting data communication bet

Details Computer interface adapter for supporting data communication bet Computer interface adapter for supporting data communication bet

1992-09-11

1995-08-01

Gregory, Bernarr E.

G06F 300

Patent

active

H00014729

ABSTRACT:
A computer interface adapter is provided to support data communication been a parallel signal device operating at the MIL-STD-1397B Type B interface and a serial signal device operating at the MIL-STD-1397B Type E interface. A first converter, connected to the input and output channels of the parallel signal device, converts parallel format data between the Type B voltage level and a standard transistor-transistor-logic (TTL) level. A second converter, connected to the input and output ports of the serial signal device, converts serial format data between the Type E voltage level and the standard TTL level. Staging memory is provided to temporarily store parallel format data at the standard TTL level. A parallel-to-serial converter converts parallel format data in the staging memory into serial format data at the standard TTL level and passes same to the second converter. A serial-to-parallel converter converts serial format data passed from the second converter into parallel format data at the standard TTL level and passes same to the staging memory. Combinational logic circuitry, in communication with the first converter, the parallel-to-serial converter and the serial-to-parallel converter, processes handshake protocol at the standard TTL level between the parallel signal device and the serial signal device. In addition, the logic circuitry latches parallel format data through the staging memory in accordance with the handshake protocol.

REFERENCES:
patent: 3975712 (1976-08-01), Hepworth et al.
patent: 4431864 (1984-02-01), Sturdevant, Jr.
patent: 4728930 (1988-03-01), Grote et al.
patent: 4740909 (1988-04-01), Conklin et al.
patent: 5257289 (1993-10-01), Jopson

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