| 摘要 |
<p>PROBLEM TO BE SOLVED: To minimize the hardware quantity of a data multiplexing circuit which multiplexes and transmits data to be transmitted including variable-length data freely variable in data length by means of specification in advance. SOLUTION: A specified data-length parameter is held in a parameter register 55 and a data-length counter 54 counts up to the count value corresponding to the data length specified by the held data-length parameter. According to this counting operation, a shift register 57 performs shifting operation, and variable-length data included in the transmitted data are outputted sequentially from a multiplexer in response to the shifting operation and multiplexed and transmitted. Consequently, a single data-length counter suffires, thereby making the hardware quantity smaller.</p> |
