| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique which reduces noise or jitters caused by wiring length resonance even in a semiconductor device or a signal transmission system the data rate of which is variable.SOLUTION: In the signal transmission system which performs signal transmission through signal wiring 4-1 to 3 between a memory 1 and a memory controller 2 mounted on a printed circuit board 3, if the noise or the jitters is increased by wiring length resonance at a specified data rate for the memory 1 and the memory controller 2, the system has registers 6-1, 6-2 which hold information of the data rate. The signal transmission system has namely, a control system to change a relation of the registers 6-1, 6-2 which save the data rate of the wiring length resonance, the clock frequency, and wiring length, so as to control the data rate or transmission delay time so as to avoid resonance. |
