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CHAPTER 17 FLASH MEMORY
17.5.1 Setting The Read/Reset State
This section describes the procedure for issuing the Read/Reset command to set the
flash memory to the read/reset state.
■ Setting the Read/Reset State
The flash memory can be set to the read/reset state by sending the Read/Reset command in the command
sequence table (see Table 17.3-1 in Section "17.3 Starting the Flash Memory Automatic Algorithm ")
continuously to the target sector in the flash memory.
The Read/Reset command has two types of command sequences that execute the first and third bus
operations. However, there are no essential differences between these command sequences.
The read/reset state is the initial state of the flash memory. When the power is turned on and when a
command terminates normally, the flash memory is set to the read/reset state. In the read/reset state, other
commands wait for input.
In the read/reset state, data is read by regular read-access. As with the mask ROM, program access from the
CPU is enabled. The Read/Reset command is not required to read data by a regular read. The Read/Reset
command is mainly used to initialize the automatic algorithm in such cases as when a command does not
terminate normally.