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MF84M1-GNCAVXX Datasheet(PDF) 8 Page - Mitsubishi Electric Semiconductor |
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MF84M1-GNCAVXX Datasheet(HTML) 8 Page - Mitsubishi Electric Semiconductor |
8 / 22 page MITSUBISHI MEMORY CARD FLASH MEMORY CARDS MITSUBISHI ELECTRIC 8/22 Feb.1999 Rev2.0 PROGRAMME ALGORITHM PROGRAMME 8 bit Operation Write the programme setup command (40h) to the address to be programmed. The next write sequence will initiate the programming operation which will end automatically as this period being controlled by an internal timer and the data will be programmed. To make sure that the data is programmed correctly read data of the status register. The read status register command (70h) may or may not be applied to read the data after the programme data input. If the data is programmed step address and programme data according to the above sequence. The next address to be programmed should be written with in a memory zone. After the last programming operation, write the reset command ( FFh) in control register of the programmed memory zones. When overwriting bits programmed as “ 0 ” , programme “ 1 ” or the device reliability is affected. 16 bit operation The algorithm of 16 bit programming is almost same as the 8 bit programming. (Please refer to the algorithm and the status of bus at programming) PROGRAMME SUSPEND 8 bit Operation The programme suspend is a command to generate zone programme interruption in order to read or data from another block of the selected memory zone. It is necessary to write the erase suspend command (B0h) in the programme algorithm. The execution of the programme suspend can be confirmed by reading data of the status register. Then it is necessary to write the read command ( FFh) in control register in order to read data, after reading the status register ’ s data. After the programme resume command (D0h) is written in the control register, the memory zone will continue the programme operation. 16 bit Operation Most of the algorithm of 16 bit programme suspending is same as the one of the 8 bit programme suspending. (Please refer to the algorithm and the state of bus at programme suspending.) ERASE ALGORITHM ERASE 8 bit Operation Write the erase setup command (20h) and erase confirm command (D0h) for the applicable block address. An erasure operation will then commence which will be finished in 1.6s typical or less this being automatically controlled by an internal timer. To make sure that the data is erased correctly and read data of the status register. The read status register command (70h) may or may not be applied to read the data after the erase confirm command. After erasure has completed write the reset command ( FFh) to the control register, proceed to the erase operation for the next memory block. 16 bit Operation Most of the algorithm of 16 bit erasure is same as the one of the 8 bit erasure. (Please refer to the algorithm and the state of bus at erasure.) ERASE SUSPEND 8 bit Operation The erase suspend is a command to generate block erase interruption in order to read or programme data from another block of the selected memory zone. It is necessary to write the erase suspend command (B0h) in the erase algorithm. The execution of the erase suspend can be confirmed by reading data of the status register. Then it is necessary to write the read command ( FFh) in control register in order to read data, after reading the status register ’ s data. After the erase resume command (D0h) is written in the control register, the memory block will continue erase operation. 16 bit Operation Most of the algorithm of 16 bit erase suspending is same as the one of the 8 bit erase suspending. (Please refer to the algorithm and the state of bus at erase suspending.) |
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