Transferring digital data in units of 2 bytes to increase utilization of a 2-byte-wide bus
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United States of America Patent
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Jun 17, 1997
Grant Date -
N/A
app pub date -
Jun 7, 1995
filing date -
Jun 10, 1994
priority date (Note) -
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Abstract
A small computer system interface (SCSI) controller for continuously or intermittently performing communication of plural sets of data. The SCSI controller includes a data register for temporarily storing a set of data, a SCSI interface for transmitting the data stored in the data register in units of 2 bytes and for receiving data from another SCSI controller in units of 2 bytes, a byte counter for counting the number of bytes of data that is transmitted from or received by the SCSI interface, an internal processor for controlling initial setting of a target count value of the byte counter, and a transfer control circuit for controlling transmission of the data stored in the data register from the SCSI interface and reception of data by the data register via the SCSI interface. In data communication in units of 2 bytes, the SCSI controller can prevent transfer of dummy data that is ineffective, to thereby provide efficient data communication.
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