Electrical computers and digital processing systems: processing – Processing architecture – Microprocessor or multichip or multimodule processor having...
Reexamination Certificate
2005-06-14
2005-06-14
Coleman, Eric (Department: 2183)
Electrical computers and digital processing systems: processing
Processing architecture
Microprocessor or multichip or multimodule processor having...
Reexamination Certificate
active
06907514
ABSTRACT:
A microcomputer is provided with a data-transfer unit such as a DMA (direct memory access) controller for controlling a transfer of data through an external bus. Used in an access to an external device controlled by the data-transfer unit, a bus-interface means of the microcomputer includes a buffer-register means which can be specified as either a source location or a destination location of a data transfer. Thus, an internal-bus master such as a CPU employed in the microcomputer is capable of reading out information such as a packet command from the buffer-register means at a high speed through an internal bus without using the external bus and, hence, capable of carrying out an operation reflecting a transfer control condition specified by the packet command.
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LSI Handbook, published by Ohm Corporation, Nove. 30, 1984, pp. 540-541 (translation).
Coleman Eric
Mattingly ,Stanger ,Malur & Brundidge, P.C.
Renesas Technology Corp.
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