DATA TRANSFER CONTROLLER

PROBLEM TO BE SOLVED: To provide a data transfer controller which eliminates the need to provide buffer areas for every end point and can miniaturize a chip by decreasing the number of gates. SOLUTION: A buffer 9 which sends and receives data in packet form to and from a PC 1 is composed of a single...

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Bibliographische Detailangaben
1. Verfasser:	OYAMA TADASHI
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING CORRECTION OF TYPOGRAPHICAL ERRORS COUNTING ELECTRIC DIGITAL DATA PROCESSING i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES PERFORMING OPERATIONS PHYSICS PRINTING SELECTIVE PRINTING MECHANISMS STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a data transfer controller which eliminates the need to provide buffer areas for every end point and can miniaturize a chip by decreasing the number of gates. SOLUTION: A buffer 9 which sends and receives data in packet form to and from a PC 1 is composed of a single buffer used in common for the end points EP0 to EP2. A USB control part 8 decides whether or not there is data in the buffer 9 by referring to a register 10 and controls data transfer with the PC 1 according to the result. A CPU 5 decides whether or not there is data in the buffer 9 by referring to the register 10 and controls the acquisition of data from the buffer 9 or the storage of data in the buffer 9 according to the result.