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JS28F320J3F75 Datasheet(PDF) 46 Page - Numonyx B.V

Part # JS28F320J3F75
Description  Numonyx® Embedded Flash Memory (J3 65nm) Single Bit per Cell (SBC)
PDF  67 Pages
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Manufacturer  NUMONYX [Numonyx B.V]
Direct Link  http://www.numonyx.com
Logo NUMONYX - Numonyx B.V

JS28F320J3F75 Datasheet(HTML) 46 Page - Numonyx B.V

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Datasheet
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Numonyx® Embedded Flash Memory (J3 65 nm) Single Bit per Cell (SBC)
9.8.8
VPEN Protection
When it’s necessary to protect the entire array, global protection can be achieved using
a hardware mechanism using VPEN. Whenever a valid voltage is present on VPEN,
blocks within the main flash array can be erased or programmed. By grounding VPEN,
blocks within the main array cannot be altered – attempts to program or erase blocks
will fail resulting in the setting of the appropriate error bit in the Status Register. By
holding VPEN low, absolute write protection of all blocks in the array can be achieved.
Table 31: Word-Wide Protection Register Addressing
Word
Use
A8
A7A6
A5A4
A3A2A1
LOCK
Both
10
00
00
00
0
Factory
10
00
00
01
1
Factory
10
00
00
10
2
Factory
10
00
00
11
3
Factory
10
00
01
00
4
User
1
00
00
10
1
5
User
1
00
00
11
0
6
User
1
00
00
11
1
7
User
1
00
01
00
0
Note:
All address lines not specified in the above table must be 0 when accessing the Protection Register (i.e., A[MAX:9] = 0.)
Table 32: Byte-Wide Protection Register Addressing
Byte
Use
A8
A7A6A5A4
A3A2A1
A0
LOCK
Both
1
000
000
00
LOCK
Both
1
000
000
01
0
Factory
1
000
000
10
1
Factory
1
000
000
11
2
Factory
1
000
001
00
3
Factory
1
000
001
01
4
Factory
1
000
001
10
5
Factory
1
000
001
11
6
Factory
1
000
010
00
7
Factory
1
000
010
01
8
User
1
000
010
10
9
User
1
000
010
11
A
User
1
000
011
00
B
User
1
000
011
01
C
User
1
000
011
10
D
User
1
000
011
11
E
User
1
000
100
00
F
User
1
000
100
01
Note:
All address lines not specified in the above table must be 0 when accessing the Protection Register, i.e., A[MAX:9] = 0.



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