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23.6.1
Setting the Read/Reset Status
This section explains the procedure of issuing the read/reset command and setting the
flash memory to the read/reset status.
■ Setting the Read/Reset Status
When the flash memory is set to the read/reset status, the read/reset command can be executed by
continuously sending the read/reset command, listed in the command sequence table (see "23.4 Method of
Starting the Automatic Algorithm in Flash Memory"), to the target sector in the flash memory.
There are two types of read/reset command sequences, one is that the bus operation is executed once and
the other is that the bus operations are executed three times. However, these command sequences have no
essential difference.
The read/reset status is the initial status of the flash memory. When the power supply is turned on, or when
the command is normally terminated, the flash memory is always set to the read/reset status. The read/reset
status means the status of the flash memory that is waiting for another command to be input.
In the read/reset status, data can be read from the flash memory by executing a usual read/access command.
The data can be program-accessed from CPU same as the mask ROM. This command is not required for
usual data reading. This command should be mainly used for initializing the automatic algorithm if the
command has not been normally terminated for any reason.
CHAPTER 23 512K / 1024K BIT FLASH MEMORY
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