RAM having dynamically switchable access modes

Details RAM having dynamically switchable access modes RAM having dynamically switchable access modes

2005-05-17

2005-05-17

Phan, Trong (Department: 2818)

Static information storage and retrieval

Read/write circuit

Data refresh

C365S203000, C365S230060

Reexamination Certificate

active

06894941

ABSTRACT:
A row addressing circuit for DRAM memory is disclosed. Additional address or mode bits are used to dynamically select between long page and short page access modes, and to dynamically select between single cell per bit and dual, or two cell per bit modes in each memory bank within a memory block. In the short page access mode, only one wordline in a memory block is activated. In the long page access mode, two wordlines in the memory block are activated for accessing twice the number of bits as in short page access mode. In the single cell per bit mode, one bit of data is stored in one DRAM cell. In the two cell per bit mode, the row addressing circuit simultaneously activates two wordlines in a bank of the memory block to access one DRAM cell connected to each bitline of a pair of complementary bitlines for writing and reading complementary data. The row addressing circuit can combine the different access modes for system design flexibility.

REFERENCES:
patent: 5440516 (1995-08-01), Slemmer
patent: 5491665 (1996-02-01), Sachdev
patent: 5504875 (1996-04-01), Mills et al.
patent: 5592410 (1997-01-01), Verhaeghe et al.
patent: 5713823 (1998-02-01), Gillingham
patent: 5784331 (1998-07-01), Lysinger
patent: 5815456 (1998-09-01), Rao
patent: 5893927 (1999-04-01), Hovis
patent: 6005803 (1999-12-01), Kuo et al.
patent: 6307771 (2001-10-01), Schlager et al.
patent: 6370077 (2002-04-01), Koyanagi et al.
patent: 6449182 (2002-09-01), Ooishi

Affiliated with

Also associated with

Rating

RAM having dynamically switchable access modes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with RAM having dynamically switchable access modes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and RAM having dynamically switchable access modes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3460241