Table of Contents
Advertisement
33.7.1
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 flash memory to 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 33.5-1 Command sequence table in Section 33.5 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 after the first and after the
third bus operation. However, there is no essential difference between those two 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.
CHAPTER 33 FLASH MEMORY
871
Advertisement
Table of Contents
