Memory supporting frequency setting and operation method of memory

An operation method of a memory, the operation method comprising:

• externally receiving a setting command and a frequency setting value;
• storing the frequency setting value in a setting information storage circuit;
• determining whether the frequency setting value stored in the setting information storage circuit is different from a previous frequency setting value;
• and
• activating a low power mode signal in response to a determination that the frequency setting value is different from the previous frequency setting value.

A memory comprising:

• a mode register set circuit configured to store various setting information;
• a frequency setting change detection circuit configured to detect a change in a frequency set point setting stored in the mode register set circuit;
• and
• an internal command generation circuit configured to activate a low power mode signal when the change in the frequency set point setting is detected.