®
Numonyx™ StrataFlash Embedded Memory (J3-65nm)
10.3
10.4
VPEN Protection
When it’s necessary to protect the entire array, global protection can be achieved using
a hardware mechanism using VPEN. Whenever a valid voltage is present on VPEN,
blocks within the main flash array can be erased or programmed. By grounding 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 VPEN low, absolute write protection of all blocks in the array can be achieved.
Password Access
Password Access is a security enhancement offered on the J3-65nm device. This
feature protects information stored in main-array memory blocks by preventing content
alteration or reads, until a valid 64-bit password is received. Password Access may be
combined with Non-Volatile Protection and/or Volatile Protection to create a multi-
tiered solution.
Please contact your Numonyx Sales for further details concerning Password Access.
December 2008
319942-02
Datasheet
29
NUMONYX [ NUMONYX B.V ]
