Data processing method, and data processor and printer using dat

Facsimile and static presentation processing – Static presentation processing – Memory

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

358 113, G06K 1500

Patent

active

06144460&

ABSTRACT:
A data processing method which efficiently performs data transfer by using a data bus with an appropriate access width corresponding to transfer data and a printer using the data processing method. In the printer, a CPU bus 70 having a 16-bit physical bus width, is shared by a CPU 21 and a DMAC 80. In a case where the CPU 21 accesses a memory via the CPU bus 70 with an 8-bit width, while the DMAC 80 accesses the memory via the CPU bus 70 with a 16-bit width, each time the DMAC 80 needs to access the memory, the DMAC 80 issues a DMA request signal to the CPU 21, requiring an exclusive access right for the CPU bus 70. In accordance with the request signal, the CPU 21 delivers the exclusive access right for the CPU bus 70 to the DMAC 80. Then the DMAC 80 controls memory access with the 16-bit width.

REFERENCES:
patent: 4122520 (1978-10-01), Adamchick et al.
patent: 4313124 (1982-01-01), Hara
patent: 4345262 (1982-08-01), Shirato et al.
patent: 4459600 (1984-07-01), Sato et al.
patent: 4463359 (1984-07-01), Ayata et al.
patent: 4467447 (1984-08-01), Takahashi et al.
patent: 4558333 (1985-12-01), Sugitani et al.
patent: 4558410 (1985-12-01), Holzner et al.
patent: 4608577 (1986-08-01), Hori
patent: 4723129 (1988-02-01), Endo et al.
patent: 4740796 (1988-04-01), Endo et al.
patent: 4953103 (1990-08-01), Suzuki
patent: 4965748 (1990-10-01), Chang et al.
patent: 4977519 (1990-12-01), Chang et al.
patent: 5072365 (1991-12-01), Burgess et al.
patent: 5119480 (1992-06-01), Garcia, Jr. et al.
patent: 5274780 (1993-12-01), Nakao
patent: 5278965 (1994-01-01), Fujihira et al.
patent: 5333294 (1994-07-01), Schnell
patent: 5404481 (1995-04-01), Miyamori
patent: 5539917 (1996-07-01), Jirgal
patent: 5564117 (1996-10-01), LEntz et al.
patent: 5579453 (1996-11-01), Lindenfelser et al.
patent: 5630163 (1997-05-01), Fung et al.
patent: 5689659 (1997-11-01), Tietjen et al.
patent: 5793397 (1998-08-01), Barker et al.
patent: 5953132 (1999-09-01), Kurosawa
patent: 5953501 (1999-09-01), Hattori

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Data processing method, and data processor and printer using dat does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Data processing method, and data processor and printer using dat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data processing method, and data processor and printer using dat will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1646939

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.