Pre-code device, and pre-code system and pre-coding method thererof

A pre-coding method applied in a pre-code machine for performing a pre-code operation on a plurality of pre-code devices, the pre-coding method comprising:

• providing a chip enable signal to enable the pre-code devices;
• providing a plurality of pre-code addresses to the respective pre-code devices;
• and
• providing a plurality of pre-code data to the respective pre-code devices to pre-code the pre-code devices with the respective pre-code data.

A pre-code device, comprising:

• a first memory circuit, comprising:
• a plurality of memory blocks, pointed respectively by a plurality of physical addresses;
• and
• a replacing block, pointed by a replacing address;
• an address decoder, for decoding an input address to provide a pre-code address;
• and
• an alternative logic circuit which maps a defect physical address among the physical addresses to the replacing address, and maps the pre-code address to the replacing address when the pre-code address corresponds to the defect physical address, wherein the pre-code device is enabled by a chip enable signal.