PF38F5070M0Y0T0 NUMONYX [Numonyx B.V], PF38F5070M0Y0T0 Datasheet - Page 59

• Manufacturer Part Number: PF38F5070M0Y0T0
• Description: Numonyx StrataFlash Wireless Memory
• Manufacturer: NUMONYX [Numonyx B.V]

Numonyx™ StrataFlash
Note:
13.2
November 2007
Order Number: 313295-04
A Lock Block Setup command followed by any command other than Lock Block, Unlock
Block, or Lock-Down Block produces a command sequence error and set Status
Register bits SR[4] and SR[5]. If a command sequence error occurs during an erase
suspend, SR[4] and SR[5] remains set, even after the erase operation is resumed.
Unless the Status Register is cleared using the Clear Status Register command before
resuming the erase operation, possible erase errors may be masked by the command
sequence error.
If a block is locked or locked-down during an erase suspend of the same block, the lock
status bits change immediately. However, the erase operation completes when it is
resumed. Block lock operations cannot occur during a program suspend. See
A, “Write State Machine” on page
suspend.
Protection Registers
The device contains 17 Protection Registers (PRs) that can be used to implement
system security measures and/or device identification. Each Protection Register can be
individually locked.
The first 128-bit Protection Register is comprised of two 64-bit (8-word) segments. The
lower 64-bit segment is pre-programmed at the factory with a unique 64-bit number.
The other 64-bit segment, as well as the other sixteen 128-bit Protection Registers, are
blank. Users can program these registers as needed. When programmed, users can
then lock the Protection Register(s) to prevent additional bit programming (see
Figure 21, “Protection Register Map” on page
The user-programmable Protection Registers contain one-time programmable (OTP)
bits; when programmed, register bits cannot be erased. Each Protection Register can
be accessed multiple times to program individual bits, as long as the register remains
unlocked.
Each Protection Register has an associated Lock Register bit. When a Lock Register bit
is programmed, the associated Protection Register can only be read; it can no longer be
programmed. Additionally, because the Lock Register bits themselves are OTP, when
programmed, Lock Register bits cannot be erased. Therefore, when a Protection
Register is locked, it cannot be unlocked.
®
Wireless Memory (L18 AD-Mux)
69, which shows valid commands during an erase
60).
Appendix
Datasheet
59