| 摘要 |
<p>PURPOSE: To simplify the hard ware of an interface part by transmitting data of a group unit during the activating of a transmission request signal at the time of inspecting the existence of the data transmission request signal from an objective interface part only once and confirming its output. CONSTITUTION: When the data transmission request signal XRQ is inputted to an output interface and right/left identification signal generation part 37, the generation part 37 inputs a reading address to a memory 35 in order to read stored data and reads corresponding data. The generation part 37 converts data inputted parallelly from the memory 35 to serial data to transmit to an external objective interface part. When data is transmitted to the objective interface part, the interface part calculates the byte number of data and at the time of finishing the input of 213 byte, sets the data request signal XRQ to H to suppress the reading operation of the memory 35.</p> |
