DMA control device and recording apparatus having priority control circuit dynamically changes defined priorities within predetermined time interval
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 3, 2000
Grant Date -
N/A
app pub date -
Feb 6, 1996
filing date -
Feb 6, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A recording apparatus is disclosed that, in use, is connected with a host apparatus, receives recording information from the host apparatus by direct memory access ('DMA') and can print received recording information by using a recording head. A first memory access circuit receives recording information from the host apparatus by DMA. A second memory access circuit supplies received recording information to the recording head with a timing appropriate for recording, using DMA. A priority circuit controls the respective priorities assigned to various types of DMA to ensure that all types of DMA demands can be accommodated within an acceptable length of time.
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