M25PE80
Operating features
■
The second software protected mode (SPM2) uses the block protect (BP2, BP1,
BP0, see Section 6.4.3) bits to allow part of the memory to be configured as read-only.
Table 4.
Protected area sizes
Status register
content
Memory content
BP2 BP1 BP0
Protected area
Unprotected area
bit
bit
bit
0
0
0
none
All sectors(1) (sixteen sectors: 0 to 15)
Lower fifteen-sixteenths (fifteen sectors:
0 to 14)
0
0
0
0
1
1
1
0
1
Upper sixteenth (Sector 15)
Lower seven-eighths (fourteen sectors:
0 to 13)
Upper eighth (two sectors: 14 and 15)
Upper quarter (four sectors: 12 to 15)
Lower three-quarters (twelve sectors: 0
to 11)
1
1
1
1
0
0
1
1
0
1
0
1
Upper half (eight sectors: 8 to 15)
All sectors (sixteen sectors: 0 to 15)
All sectors (sixteen sectors: 0 to 15)
All sectors (sixteen sectors: 0 to 15)
Lower half (eight sectors: 0 to 7)
none
none
none
1. The device is ready to accept a bulk erase instruction if, and only if, all block protect (BP2, BP1, BP0) are 0.
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NUMONYX [ NUMONYX B.V ]
