| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To enable reduction of both a communication time when transferring data and a transfer error occurrence frequency, by making it possible to properly adjust a baud rate according to a transmission data size, without transmitting/receiving a special command, and to reduce an initialization processing time by making unnecessary a series of operation for determining the baud rate. <P>SOLUTION: A start mark ST in the transfer data of a start-stop synchronization method is set to be a 2-bit alternating data. A detector 22 obtains a pulse width PW by measuring between a rise and a fall edge of the ST, a generator 23 generates a CK2 corresponding to the baud rate from the PW, and a reception controller 24 fetches the data from the CK2. A calculation setter 26 obtains an optimal baud rate corresponding to the size of a processing result data D4 in a data, and a generator 27 generates a CK3 corresponding to the optimal baud rate. A transmission controller 28 fetches D4 using CK3, and transmits the above ST with added stop mark thereafter. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
