Memory refreshing control apparatus comprising a unique refreshing counter
AssigneeNEC Corporation
InventorOsamu Ikabata
Life of this patent
Estimating the term…
Abstract
In a memory refreshing control apparatus for controlling a memory (20) comprising a plurality of bank memories (21, 22, 23, 24) each necessitating refreshing operation, a unique refreshing counter (11) produces a refreshing request while a memory access requesting section (13) produces an access request. A request executing arrangement (12, 14, 15, 16) concurrently executes refreshing processing and access processing for the memory (20) when the refreshing request and the access request are in contention and when the refreshing request and the access request are requests for different bank memories.
Claims11
A memory refreshing control apparatus for controlling a memory comprising a plurality of bank memories each necessitating refreshing operation, said memory refreshing control apparatus comprising:
- a unique refreshing counter for producing a refreshing request for refreshing said memory;
- a memory access requesting section for producing a memory access request for accessing said memory;
- a memory monitoring section, connected to said memory, for monitoring access states in said plurality of bank memories to produce monitored information;
- and
- request executing means, connected to said unique refreshing counter, said memory access requesting section, said memory monitoring section, and said memory, for concurrently executing, with reference to said monitored information, a refreshing processing and a memory access processing for said memory when said refreshing request and said memory access request are in contention and when said refreshing request and said memory access request are requests for different bank memories.
A method of controlling a memory comprising a plurality of bank memories each necessitating refreshing operation, said method comprising the steps of;
- producing, in a unique refreshing counter, a refreshing request for refreshing said memory;
- producing, in a memory access requesting section, a memory access request for accessing said memory;
- monitoring access states of said plurality of bank memories to produce monitored information;
- and
- concurrently executing, with reference to said monitored information, a refreshing processing and a memory access processing for said memory when said refreshing request and said memory access request are in contention and when said refreshing request and said memory access request are requests for different bank memories.
Dependencies are inferred from the claim text.