NP8P128A13BSM60E Micron Technology Inc, NP8P128A13BSM60E Datasheet - Page 30

• Manufacturer Part Number: NP8P128A13BSM60E
• Manufacturer: Micron Technology Inc

Specifications of NP8P128A13BSM60E

• Lead Free Status / Rohs Status: Supplier Unconfirmed

10.0
10.1
10.1.1
10.1.2
Table 13: Block Locking Truth Table
Datasheet
30
≤ V
V
X
PPLK
PP
Security Mode
The device features security modes used to protect the information stored in the flash
memory array. The following sections describe each security mode in detail.
Block Locking
There are two types of block locking on Numonyx® Omneo™ P8P PCM:
Zero Latency Block Locking
Individual instant block locking protects code and data. It allows software to control
block locking or it can require hardware interaction before locking can be changed. Any
block can be locked or unlocked with no latency. Locked blocks cannot be written or
erased; they can only be read. Write or erase operations to a locked block returns a
Status Register bit SR.1 error. The following sections discuss the locking operations.
State [WP#, LAT1, LAT0] specifies lock states (WP# = WP# state, LAT1= internal Block
Lock Down latch status, LAT0 = internal Block Lock latch status).
Locking State Diagram” on page 33
summarizes the locking functionality.
The block lock registers are not affected by the V
read even if V
The following sections describe how to lock, unlock, and lock-down a block.
page 32
Operations Flowchart” on page
Lock Block
All blocks default power-up or reset state is locked (states [001] or [101]) to fully
protect it from alteration. Write or erase operations to a locked block return a Status
Register bit SR.1 error. The Lock Block command sequence can lock an unlocked block.
• Zero Latency Block Locking
• Selectable One Time Programmable (OTP) Block Locking
• All blocks power-up in the locked state. Then Unlock and Lock commands can
• The Lock-Down command locks and prevents a block from being unlocked when
WP#
unlock or lock them
WP# = V
V
X
IL
This type of locking allows for permanent locking of the parameter blocks and 3
main blocks.
WP# = V
If a previously locked-down block is given a Lock/Unlock/Lock-Down command
and WP# returns to V
Lock-Down is cleared only when the device is reset or powered-down.
shows the state table for the locking functions. See also
IL
PP
RST#
is below V
IH
V
V
IH
IL
overrides lock-down so commands can unlock/lock blocks
All blocks write/erase protected
All blocks write/erase protected
PPLK
Block Write Protection
IL
.
78.
then those blocks will return to lock-down
defines possible locking states. The following
PP
level; they may be modified and
Block lock bits may not be changed
Lock-Down block states may not be
changed
Numonyx® Omneo™ P8P Datasheet
Block Lock Bits
Section 35, “Locking
Figure 6, “Block
Table 14 on
August 2010
316144-07