| 摘要 |
PURPOSE: To eliminate data loss due to clocking delay by making a sub chain for receiving the different type with less delay of scanning clocks appear after a scanning line. CONSTITUTION: The distribution of the sub chains 12, 14, 16, 18 and 20 in the entire scanning line 10 formed when SCAN EN is asserted is decided by the different type of system clocks(SYSCLK) received by the sub chains 12, 14, 16, 18 and 20. The sub chains 12, 14, 16, 18 and 20 receive the scanning line of the different type with the least delay. Thus, the sub chain 20 for receiving the SYSCLK of the different type without the delay is placed at the end of the scanning line. Thus, the data loss due to delay clocks is eliminated. |
