RD28F1604C3B90 Intel, RD28F1604C3B90 Datasheet - Page 24
RD28F1604C3B90
Manufacturer Part Number
RD28F1604C3B90
Description
Manufacturer
Intel
Datasheet
1.RD28F1604C3B90.pdf
(75 pages)
Specifications of RD28F1604C3B90
Operating Supply Voltage (max)
3.3V
Operating Temperature (max)
85C
Mounting
Surface Mount
Lead Free Status / RoHS Status
Not Compliant
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C3 SCSP Flash Memory
3.8.2
3.8.3
Figure 3.
26 Aug 2005
24
The protection register bits are programmed using the two-cycle Protection Program command.
The 64-bit number is programmed 16 bits at a time for word-wide parts. First write the Protection
Program Setup command, C0h. The next write to the device will latch in address and data and
program the specified location. The allowable addresses are shown in Appendix E. See
“Protection Register Programming Flowchart” on page
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 or to a previously 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).
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. This bit is set using the Protection Program command to program FFFDh 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. A Protection Program command to locked words will
result in a status register error (program error bit SR.4 and Lock Error bit SR.1 will be set to 1).
The protection register lockout state is not reversible.
Protection Register Memory Map
Programming the Protection Register (C0h)
Locking the Protection Register
Intel
®
Advanced+ Boot Block Flash Memory (C3) SCSP Family
Order Number: 252636, Revision: 004
88H
85H
84H
81H
80H
Factory Programmed
PR-LOCK
User Programmed
4 Words
4 Words
51.
Datasheet
Figure 20
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