| 摘要 |
PROBLEM TO BE SOLVED: To provide a communication system of a 2-line type. SOLUTION: A controller 1 such as a CPU and a real time clock device 2 are connected by a data line 3 for transferring timer data by BCD codes and a clock line 4 for transferring clocks, '1' of at least five successive bits and the plural bits for indicating control contents are used as control data for indicating the start and stop of the timer data transferred by the data line 3 and they are added to the timer data and transferred. |
