Erasing All Data (Erasing Chips) - Fujitsu MB90390 Series Hardware Manual

28.7.3

Erasing All Data (Erasing Chips)

This section describes the procedure for issuing the Chip Erase command to erase all
data in the flash memory.
■ Erasing All Data in the Flash Memory (Erasing Chips)
All data can be erased from the flash memory by sending the Chip Erase command in the command
sequence table (see Table 28.5-1 in Section "28.5 Starting the Flash Memory Automatic Algorithm")
continuously to the target sector in the flash memory.
The Chip Erase command is executed in six bus operations. When writing of the sixth cycle is completed,
the chip erase operation is started. For chip erase, the user need not write to the flash memory before
erasing. During execution of the automatic erase algorithm, the flash memory writes "0" for verification
before all of the cells are erased automatically.
CHAPTER 28 3M-BIT FLASH MEMORY
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