Semiconductor memory having test function for refresh operation

Details Semiconductor memory having test function for refresh operation Semiconductor memory having test function for refresh operation

2006-09-26

2006-09-26

Padmanabhan, Mano (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S105000, C711S167000, C365S222000

Reexamination Certificate

active

07114025

ABSTRACT:
A semiconductor memory includes a refresh timer and an arbiter for determining the order of precedence between an access operation and a refresh operation, in order to automatically perform refresh operations inside the memory. A detecting circuit operates in a test mode and outputs a detection signal indicating that the refresh operation is yet to be performed, when a new internal refresh request occurs before the refresh operation is performed. For example, the detection signal is output when the interval of access requests is short and no refresh operation can be inserted between the access operations. That is, in the semiconductor memory in which refresh operations are performed automatically, it is possible to evaluate the minimum interval of supplying access requests. As a result, the evaluation time can be reduced with a reduction in the development period of the semiconductor memory.

REFERENCES:
patent: 6625079 (2003-09-01), Yahata et al.
patent: 6714470 (2004-03-01), Leung et al.
patent: 6741515 (2004-05-01), Lazar et al.
patent: 6757207 (2004-06-01), Lazar
patent: 6771554 (2004-08-01), Lazar
patent: 6795363 (2004-09-01), Nakashima et al.
patent: 6842392 (2005-01-01), Mizugaki et al.
patent: 6851017 (2005-02-01), Horiguchi et al.
patent: 63-247995 (1988-10-01), None
patent: 7-58589 (1995-06-01), None

Affiliated with

Also associated with

Rating

Semiconductor memory having test function for refresh operation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Semiconductor memory having test function for refresh operation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Semiconductor memory having test function for refresh operation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3618765