Semiconductor integrated circuit capable of readily adjusting circuit characteristic

摘要

A semiconductor integrated circuit includes: first and second counters activated upon receipt of a low level signal and outputting a signal with a period which is twice that of the signal input; first fuse circuits connected to first counters; and a second fuse circuit connected to second counter. First counters are inactivated when fuses included in first fuse circuits are disconnected, and second counter is activated when a fuse included in second fuse circuit is disconnected. Thus, the period of a signal for determining a refresh period can be efficiently adjusted. Here, the arrangement of first fuse circuits and a second fuse circuit can be converse.