Disclosed are a semiconductor memory device with a mode register that prevents the semiconductor device from undesirably entering into a deep power down mode during the beginning of a power up and a method for controlling a deep power down mode therein. An internal power supply voltage generator generates...http://www.google.com/patents/US6744687?utm_source=gb-gplus-sharePatent US6744687 - Semiconductor memory device with mode register and method for controlling deep power down mode therein
