Method for acquiring data in a logic analyzer

Details Method for acquiring data in a logic analyzer Method for acquiring data in a logic analyzer

1989-09-29

1991-11-19

Smith, Jerry

Excavating

371 151, 371 291, G06F 1100

Patent

active

050671308

ABSTRACT:
A logic analyzer stores the activity around the last in a series of triggering events while also storing the activity around several other triggering events immediately preceding the last trigger. The acquisition memory is first positioned into a number, N, of memory sections and the trigger condition of interest is defined. Then repeated acquistions are performed using this same trigger condition. At first, data from each of these acquisitions is stored in each one of the number of memory sections. When all of the memory sections have been filled once, if the trigger condition is still occurring, the acquisition memories are reused in the same order in which they were originally used as many times as necessary until it is ascertained that the trigger condition is no longer occurring or some external conditon has changed, at which time the logic analyzer is stopped. One of the memory sections then contains the data that occurred in the vicinity of the last trigger. Another of the memory sections contains data reflecting the activity that immediately preceded the stopping of the logic analyzer. The remaining N-2 memory sections contain data that occurred in the vicinity of the triggers that immediately preceded the last trigger. Timestamping the acquired data allows the timing relationships involved to be reconstructed.

REFERENCES:
patent: 4480317 (1984-10-01), Haag et al.
patent: 4513395 (1985-04-01), Henry et al.
patent: 4654848 (1987-03-01), Noguchi
patent: 4731768 (1988-03-01), Easterday
patent: 4835736 (1989-05-01), Easterday
patent: 4965800 (1990-10-01), Farnbach
Phillips Data Test Equipment, Phillips Test and Measuring Instruments, Inc., Including Models PM3540, PM3543, PM3551A, PM8810, PM8811.

Affiliated with

Also associated with

Rating

Method for acquiring data in a logic analyzer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for acquiring data in a logic analyzer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for acquiring data in a logic analyzer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1375391