參數(shù)資料
型號(hào): 28F128
廠商: Intel Corp.
英文描述: 3 Volt Intel StrataFlash Memory
中文描述: 3伏特英特爾StrataFlash存儲(chǔ)器
文件頁(yè)數(shù): 34/58頁(yè)
文件大小: 380K
代理商: 28F128
28F128J3A, 28F640J3A, 28F320J3A
28
Preliminary
device will latch in address and data and program the specified location. The allowable addresses
are shown in
Table 20
or
Table 21
. See
Figure 14,
Protection Register Programming Flowchart
on page 37
Any attempt to address Protection Program commands outside the defined protection register
address space will result in a status register error (program error bit SR.4 will be set to 1).
Attempting to program a locked protection register segment will result in a status register error
(program error bit SR.4 and lock error bit SR.1 will be set to 1).
4.15.3
Locking the Protection Register
The user-programmable segment of the protection register is lockable by programming Bit 1 of the
PR-LOCK location to 0. Bit 0 of this location is programmed to 0 at the Intel factory to protect the
unique device number. Bit 1 is set using the Protection Program command to program
FFFD
to
the PR-LOCK location. After these bits have been programmed, no further changes can be made to
the values stored in the protection register. Protection Program commands to a locked section will
result in a status register error (program error bit SR.4 and Lock Error bit SR.1 will be set to 1).
Protection register lockout state is not reversible.
0667_06
NOTE:
A
0
is not used in x16 mode when accessing the protection register map (See
Table 20
for x16
addressing). For x8 mode A
0
is used (See
Table 21
for x8 addressing).
Figure 6. Protection Register Memory Map
4 Words
Factory Programmed
4 Words
User Programmed
1 Word Lock
88H
85H
84H
81H
80H
Word
Address
A[23 - 1]: 128 Mbit
A[22 - 1]: 64 Mbit
A[21 - 1]: 32 Mbit
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