Programmable macrocell circuit

Details Programmable macrocell circuit Programmable macrocell circuit

1994-09-22

1995-06-13

Hudspeth, David R.

Electronic digital logic circuitry

Multifunctional or programmable

Array

326 45, H03K 19094

Patent

active

054246547

ABSTRACT:
A digital logic circuit for use in or as a macrocell which can be programmed to operate as a flip-flop or as a latch, or to be transparent to a signal, and which also has programmable output polarity. This programmable macrocell circuit has two master latch elements and one slave latch element. The master latch elements are respectively inverting and noninverting latches which are located on two parallel alternate paths. A set of pass transistors on the input end of the two paths causes an input signal to drive only a selected one of the two paths and its associated master latch element. A two-by-one multiplexer connects the output of the selected master latch element in one of the two signal paths to the input of the slave latch. The control signals for the set of pass transistors and the two-by-one multiplexer can be either clock signals or fixed logic level signals, the particular choice of signals determining whether the circuit operates as a flip-flop, latch, or transparent circuit, and the particular choice of signal paths determining the circuit's output polarity.

REFERENCES:
patent: 5001368 (1991-03-01), Cliff et al.
patent: 5003204 (1991-03-01), Cushing
patent: 5017809 (1991-05-01), Turner
patent: 5023484 (1991-06-01), Pathak
patent: 5148052 (1992-09-01), Yellamilli
patent: 5164612 (1992-11-01), Kaplinsky
patent: 5295174 (1994-03-01), Shimizu

Affiliated with

Also associated with

Rating

Programmable macrocell circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Programmable macrocell circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Programmable macrocell circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1312175