rc28f320j3d75d Numonyx, rc28f320j3d75d Datasheet - Page 46

• Manufacturer Part Number: rc28f320j3d75d
• Manufacturer: Numonyx

Table 29: Byte-Wide Protection Register Addressing
9.7.7
Datasheet
46
Note:
LOCK
LOCK
Byte
C
D
0
1
2
3
4
5
6
7
8
9
A
B
E
F
All address lines not specified in the above table must be 0 when accessing the Protection Register, i.e., A[MAX:9] = 0.
Factory
Factory
Factory
Factory
Factory
Factory
Factory
Factory
Both
Both
User
User
User
User
User
User
User
User
Use
VPP/ VPEN Protection
When it’s necessary to protect the entire array, global protection can be achieved using
a hardware mechanism. using VPP or VPEN. Whenever a valid voltage is present on VPP
or VPEN, blocks within the main flash array can be erased or programmed. By
grounding VPP or 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 VPP or VPEN low, absolute write protection of all blocks
in the array can be achieved.
A8
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
A7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
A6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
A5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
A4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
Numonyx™ Embedded Flash Memory (J3 v. D)
A3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
A2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
A1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
November 2007
308551-05
A0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1