| 摘要 |
PROBLEM TO BE SOLVED: To reduce the storage capacity of a storage means used for setting an alternate block to an invalid block when using a NAND type flash memory. SOLUTION: When a head address is input to read a beat code from the NAND type flash memory, if an LUT (look up table) of the invalid block is created, a first block address is set from the input address, then the set block address is compared with the invalid block of the LUT, and if the set block address is the invalid block ( steps 120-130), the following block address is set based on the block address determined to be the invalid block (step 136). If the set block address is for an effective block, the set address is set as an output address to the flash memory (step 132). A boot code can thereby be read using the LUT storing only the invalid blocks. COPYRIGHT: (C)2009,JPO&INPIT
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