| 摘要 |
To provide a semiconductor device including a skew detecting circuit activated in a write leveling mode, and an ODT control circuit that activates a terminating resistance circuit connected to a data strobe terminal by using an ODT signal. The ODT control circuit includes counters that delay the ODT signal, activates the terminating resistance circuit by using the ODT signal having passed the counters in a normal operation mode, and activates the terminating resistance circuit by using the ODT signal having bypassed the counters in the write leveling mode. With this configuration, in the write leveling mode, a write leveling operation can be performed quickly without waiting for latency of the ODT signal. |
