解码方法、记忆体储存装置与记忆体控制电路单元;DECODING METHOD, MEMORY STORAGE DEVICE AND MEMORY CONTROLLING CIRCUIT UNIT

摘要

一种解码方法，记忆体储存装置与记忆体控制电路单元。此方法包括：根据第一读取电压读取多个记忆胞以取得第一验证位元；根据第一验证位元来执行包含一机率解码演算法的解码程序以产生多个第一解码位元，并利用第一解码位元判断是否解码成功；以及若解码失败，根据第二读取电压读取记忆胞以取得第二验证位元，根据第二验证位元来执行解码程序以产生多个第二解码位元。其中第二读取电压不同于第一读取电压，并且第二读取电压的个数相同于第一读取电压的个数。藉此，可以提升更正错误的能力。; executing a decoding procedure including a probability deciding algorithm according to the first verifying bits to obtain first decoded bits, and determining whether a decoding is successful by using the decoded bits; if the decoding are failed, reading the memory cells according to a second reading voltage to obtain second verifying bits, and executing the decoding procedure according to the second verifiying bits to obtain second decoded bits. The second reading voltage is different from the first reading voltage, and the number of the second reading voltage is equal to the number of the first reading voltage. Accordingly, the ability for correcting errors is improved.