Placing Flash Memory In The Read/Reset State - Fujitsu F2MC-8FX Hardware Manual

F2mc-8fx 8-bit microcontroller
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28.6.1

Placing Flash Memory in the Read/Reset State

This section explains the procedure for entering the read/reset command to place flash
memory in the read/reset state.
Placing Flash Memory in the Read/Reset State
• To place flash memory in the read/reset state, send the read/reset command in the command sequence
table continuously from the CPU to flash memory.
• The read/reset command is available in two different command sequences: one involves a single bus
operation and the other involves four bus operations, which are essentially the same.
• Since the read/reset state is the initial state of flash memory, the flash memory always enters this state
after the power is turned on and at the normal termination of a command. The read/reset state is also
described as the wait state for command input.
• In the read/reset state, read access to flash memory enables data to be read. As is the case with masked
ROM, program access from the CPU can be made.
• Read access to flash memory does not require the read/reset command. If a command is not terminated
normally, use the read/reset command to initialize the automatic algorithm.
CHAPTER 28 256-KBIT FLASH MEMORY
535

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