Fujitsu FR60 Hardware Manual page 559

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This bit indicates the operation status of the automatic algorithm (write/erase).

When this bit is set to "0," writing or erasure is in progress with the automatic algorithm and no write

and erase command can be accepted. Moreover, data cannot be read from any address in flash memory.

The read data indicates the flash memory status as listed in the table below.

Writing or erasing is in process, flash memory is not ready to accept a new write/erase

command, and no data can be read from a flash memory address.

Flash memory is ready to accept a new write/erase command and data can be read from a

flash memory address.

This bit is not initialized during a reset. (The value of this bit depends on flash memory status.)

Only read operation is possible, but write operation does not affect this bit.

[Bit 2] Reserved: Reserved bit

Always set this bit to "0."

Mb91350a series