Data transfer control device, electronic equipment, and data...

Details Data transfer control device, electronic equipment, and data... Data transfer control device, electronic equipment, and data...

2007-06-26

2007-06-26

Perveen, Rehana (Department: 2116)

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output data buffering

Reexamination Certificate

active

11264170

ABSTRACT:
A data transfer control device including a buffer is provided which includes an EP2area (a data storage area set to FIFO) and a CSW area (a randomly accessible status storage area), when data and a CSW are allocated as information to be transferred through one end point EP2.When a phase has switched from a USE data phase (data transport) to a status phase (status transport), the information read area is switched from the EP2area to the CSW area. and IN data to be transferred from the end point EP2to a host is read from the CSW area. A CSW0area for success status and a CSW1area for non-success status are provided, and a status block packet in which is set either success or non-success default information is previously written therein.

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