State machine standard cell that supports both a Moore and a Mea

Details State machine standard cell that supports both a Moore and a Mea State machine standard cell that supports both a Moore and a Mea

1984-07-23

1987-09-01

Krass, Errol A.

Boots, shoes, and leggings

340803, 340750, 340789, 364200, G06F 1300, G06F 314

Patent

active

046912894

ABSTRACT:
A video system controller allows for the transfer of data between a display memory and a microprocessor that is used to control the controller and from the display memory to a CRT monitor. The transfer operations are controlled by the video system controller through a state machine that is configured with a plurality of standard cells connected in cascade arrangement, which can be configured as either a Moore or a Mealy state machine. Each state machine has a programmable logic array in which timing signals, when applied thereto, will cause a predetermined output to appear on the output on each of the standard cells. A logic means, depending upon whether the machine is a Moore type state machine or a Mealy type state machine logically manipulates the output of the programmable logic array to obtain the state output for that particular cell.

REFERENCES:
patent: 4286320 (1981-08-01), Ott
patent: 4390780 (1983-06-01), Wu et al.
patent: 4566005 (1986-01-01), Apperley et al.

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