Importance

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Abstract

The invention relates to a method for controlling a flash memory (9), which is comprised by a secondary unit of a communications device (2) which can be connected to a host (1) and, for mass storage, is written with data (SS1, SSN, SS1N, SA, BE, S1N, S1ML) to be stored. According to the invention, the flash memory (9) is subdivided into blocks (10) which each comprise storage units (S1-SN), and a storage unit (SS1) that has been written to can only be written to again if, before writing to the storage unit (SS1), all the storage units (S1, S2, SS1, SN) of the block (10) of the storage unit (SS1) to be written to are erased. The flash memory (9) is controlled in such a way that at least some storage units (S1-SN) which are to be written to and the data (SG, SS1N, SAI, BEI, S1MLG) of said units is unchanged after being written to as compared with before being written to are neither erased nor written to, and at least some erased storage units (S, SG, SDG, SMG) which are to be written to and the data (SG) of said units is changed after being written to as compared with before being written to, are written to with the data to be stored (SS1N, BEI, S1NI) without being erased again.

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First Claim