Data transfer control unit with selectable transfer unit size

Details Data transfer control unit with selectable transfer unit size Data transfer control unit with selectable transfer unit size

2007-12-18

2007-12-18

Kim, Matthew (Department: 2186)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C710S033000, C710S034000, C710S035000

Reexamination Certificate

active

10453545

ABSTRACT:
A data processor including a central processing unit and a data transfer control unit is disclosed. The data transfer control unit has an address register for storing a transfer address. The data transfer control unit transfers data according to a transfer unit size selected from a plurality of transfer unit sizes. If the address register contains an odd address as an initial value, the data transfer control unit transfers data according to a different transfer unit size that is smaller than the selected transfer unit size. If the data transfer control unit determines that a remaining quantity of data to be transferred is smaller than the selected transfer unit size, the selected transfer unit size is switched to a smaller transfer unit size selected from the plurality of transfer unit sizes.

REFERENCES:
patent: 4758899 (1988-07-01), Tsukiyama
patent: 6578095 (2003-06-01), Tanaka et al.
patent: 6763401 (2004-07-01), Hayashi et al.
patent: 6901465 (2005-05-01), Kamihara et al.
patent: 3-134750 (1991-06-01), None
patent: 11-85670 (1999-03-01), None
patent: 2001-154977 (2001-06-01), None

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