NP8P128A13BSM60E Datasheet, PDF (38/92 Pages) Numonyx B.V – 128-Mbit Parallel Phase Change Memory

Numonyx® Omneo™ P8P Datasheet
For the 2K OTP space, there exists an additional 16-bit lock register called PR_LOCK1.
Each bit in the PR_LOCK1 register locks a 128-bit segment of the 2K-OTP space.
Therefore, the 16 128-bit segments of the 2K OTP space can be locked individually.
Hence, any 128-bit segment can be first programmed and then locked using the
protection program command followed by protection register data. The PR-LOCK1
register is physically located at the address 89h as shown in the Figure 8, “Protection
Register Memory Map” on page 38.
After PR-LOCK register bits have been programmed, no further changes can be made to
the protection registers' stored values. Protection Program commands written to a
locked section result in a Status Register error (Program Error bit SR.4 and Lock Error
bit SR.1 are set to 1). Once locked, Protection register states are not reversible.
Figure 8: Protection Register Memory Map
109h
102h Group 17
8 Words
User Programmed
91h
8Ah Group 2
89h
8 Words
User Programmed
Lock Register 1
88h
4 Words (64 bits)
User Programmed
85h Group 1
84h
4 Words (64 bits)
Intel Factory Programmed
81h Group 0
80h
Lock Register 0
Datasheet
38
July 2010
316144-07