Read/Reset State In Flash Memory - Fujitsu F2MC-16LX Hardware Manual

CHAPTER 25 3M-BIT FLASH MEMORY
25.6.1

Read/Reset State in Flash Memory

This section describes the procedure to issue the read/reset commands and to set the
read/reset state in flash memory.
Read/Reset State in Flash Memory
To set the flash memory to the read/reset state, it is possible to execute by sending the read/reset command
sequentially in the command sequence table (See Table 25.4-1) to the target sector in the flash memory.
The read/reset command has two kinds of command sequences of the one-time bus operation and the three-
times bus operation, while in fact, there is no fundamental differences between them.
The read/reset state is the initial state of the flash memory, and this system is always the read/reset state at
the time of the power-on or the normal command completion. Reading/reset is an input waiting state of
other commands.
In the read/reset state, you can read-access normally to read data. As with mask ROM, program access
from the CPU is enabled. This command is not needed to read data in the normal data read. When you need
to initialize the automatic algorithm as in the case of an abnormal command completion for some causes,
this command is mainly used.
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