Memory controller that selectively changes frequency of a...

Details Memory controller that selectively changes frequency of a... Memory controller that selectively changes frequency of a...

2008-07-01

2008-07-01

Sough, Hyung S. (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Access timing

C711S103000, C711S105000, C713S501000

Reexamination Certificate

active

10915221

ABSTRACT:
Provided are a memory controller that selectively changes a frequency of a memory clock signal, a smart card including the memory controller, and a method of controlling a read operation of a memory. The memory controller includes a central processing unit (CPU), a memory interface, and a frequency change controller. The CPU outputs a read command signal in response to a data read request signal and outputs a write command signal in response to a data write request signal. The memory interface outputs a plurality of control signals in response to one of the read command signal and the write command signal, generates a memory clock signal based on a system clock signal, and changes a frequency of the memory clock signal in response to a frequency change control signal. The frequency change controller outputs the frequency change control signal in response to the plurality of control signals and the memory clock signal. The memory controller, the smart card including the memory controller, and the method of controlling a read operation of a memory prevent the memory from outputting erroneous data when the memory is operated at a high frequency.

REFERENCES:
patent: 4794523 (1988-12-01), Adan et al.
patent: 5819076 (1998-10-01), Jeddeloh et al.
patent: 6073223 (2000-06-01), McAllister et al.
patent: 6510095 (2003-01-01), Matsuzaki et al.
patent: 2002/0039324 (2002-04-01), Lee
patent: 0 827 154 (1998-04-01), None
Hendry, Mike Smart Card Security and Applications, (c) 1997, Artech House, pp. 82-83, 226 ISBN: 0-89006-953-0.

Affiliated with

Also associated with

Rating

Memory controller that selectively changes frequency of a... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Memory controller that selectively changes frequency of a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Memory controller that selectively changes frequency of a... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3926592