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■ Temporary Sector Protect Cancel
Once a sector is protected by enable sector protect, write/erase operations are disabled unless it breaks
down. However, the temporary sector protect cancel operation can cancel the protection information in the
protected sector temporarily. This operation is set by keeping an application of V
period, the sector protection information that is set before is ignored, and so write/erase operations can be
performed in all sectors. When MD1 returns to "1" (=3.3 V), this operation is canceled and all sectors
protected before are protected again. Figure 17.6-2 shows the temporary sector protect cancel algorithm.
Execute erase or write operations
Sector protect cancellation end
Figure 17.6-2 Temporary Sector Protect Cancel Algorithm
Start
*1
MD1=VID
MD1="H"
*2
CHAPTER 17 FLASH MEMORY
*1: The protection of all protected sectors is
cancelled.
*2: Sectors protected before are protected
again.
to MD1. In this
ID
429
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