Samsung Electronics Co., Ltd.

Bong-chun Kang

Jong-In Kim

Young-wook Jang

Kwan-Ho Kim

Jong-Jin Lee

Hee-Dong Shin

Dae-Woong Kim

A memory controller includes an digitally programmable delay unit having a selectable delay time receiving a read-enable signal and outputting a delayed read-enable signal. The delay time is selected in response to an externally applied delay-control signal. A sampling unit in the memory controller outputs data received from a separate memory, in synchronization with the delayed enable signal. The delay time may be a multiple of the period of a clock signal.

Memory controller

A method and apparatus for detecting a free page of a memory device, and a method and apparatus for decoding an error correction code by using the method and apparatus for detecting a free page are provided. Free page data read from the memory is converted into a converted codeword for inclusion as an element of an error correction code field. The converted codeword is compared to an initially set target codeword to detect an amount of non-identical bits. A page read from the memory is determined to be a free page when the amount of non-identical bits is equal to or less than an initially set threshold value.

Method and apparatus for detecting free page and a method and apparatus for decoding error correction code using the method and apparatus for detecting free page

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Ansan-si, South Korea

Bong-chun Kang