| 摘要 |
<p>PROBLEM TO BE SOLVED: To receive an AT command accurately at all times, regardless of a reception speed of input data. SOLUTION: A universal asynchronous receiver/transmitter(UART) 2 receives input data, consisting of AT commands by a start-stop synchronization method. A speed detection section 3 detects a speed of input data, based on a length of start bits of head characters of the input data. A clock application section 5 generates a reception clock, based on a speed detected by the speed detection section 3 and supplies it as a reception clock of the UART 2. A mask section 1 masks the head characters of the input data, based on a speed detected by the speed detection section 3 to inhibit input to the UART 2. The head characters are received by a head character reception section 4.</p> |
