发明名称 |
Data transfer control device and electronic instrument |
摘要 |
A data transfer control device and an electronic instrument which can implement a process to be made on data transmitted and received through a high speed bus on a circuit operating at a low frequency. The data transfer control device has a conversion circuit which converts K-bit width data transferred at a frequency FC 1 (in USB 2.0 HS mode) through a bus into data having an L-bit width (L>K) by rearranging, and a processing circuit which receives the L-bit width data from the conversion circuit and carries out a K-bit based process on an L-bit basis at a frequency FC 2 lower than FC 1 . This enables to perform the K-bit based process at the low frequency FC 2 . Configuration on a transmission end can be implemented in the same manner. The transfer data in the USB 2.0 HS mode is processed on the L-bit basis while the transfer data in the FS mode is processed on the K-bit basis. The present invention is applicable also to the process on data transferred through a bus under the IEEE1394 or SCSI.
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申请公布号 |
US7047332(B2) |
申请公布日期 |
2006.05.16 |
申请号 |
US20040997871 |
申请日期 |
2004.11.29 |
申请人 |
SEIKO EPSON CORPORATION |
发明人 |
ISHIDA TAKUYA;KAMIHARA YOSHIYUKI |
分类号 |
G06F3/00;G06F13/38;G06F5/00;G06F13/12;G06F13/40;G11C11/00;H03M9/00;H04J3/18;H04L12/40;H04L25/49 |
主分类号 |
G06F3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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