PF38F5070M0Q0B0 NUMONYX [Numonyx B.V], PF38F5070M0Q0B0 Datasheet - Page 96

• Manufacturer Part Number: PF38F5070M0Q0B0
• Manufacturer: NUMONYX [Numonyx B.V]

Table 46: Block Locking Command Bus Cycles
Note:
Datasheet
96
Lock Block
Unlock Block
Lock-Down Block
To lock, unlock, or lock-down a block, first issue the setup command to any address
within the desired block. The read mode of the addressed partition is automatically
changed to Read Status Register mode. Next, issue the desired confirm command to
the block’s address. Note that the confirm command determines the operation
performed. The Status Register should be checked for any errors, and then cleared.
The lock status of a block can be determined by issuing the Read Device Information
command, and then reading from <block base address> + 02h. DQ0 indicates the lock
status of the addressed block (0 = unlocked, 1 = locked), and DQ1 indicates the lock-
down status of the addressed block (0 = lock-down not issued; 1 = locked-down
issued).
of this operation.
Blocks cannot be locked or unlocked while being actively programmed or erased. Blocks
can be locked or unlocked during erase-suspend, but not during program-suspend.
If a block-erase operation is suspended, and then the block is locked or locked down,
the lock status of the block will be changed immediately. When resumed, the erase
operation will still complete.
Block lock-down protection is dependent on WP#. When WP# = V
down are locked, and cannot be unlocked using the Block Unlock command. When
WP# = V
individually unlocked using the Block Unlock command. Subsequently, when WP# =
V
locked-down blocks that may have been unlocked while WP# was de-asserted.
A locked-down block can only be unlocked by issuing the Unlock Block command with
WP# deasserted. To return an unlocked block to the locked-down state, a Lock-Down
command must be issued prior to asserting WP#.
Issuing the Block Lock-Down command to an unlocked block does not lock the block.
However, asserting WP# after issuing the Block Lock-Down command locks (and locks
down) the block. Lock-down for all blocks is cleared upon power-up or exit from reset.
Figure 49
Command
IL
, previously locked-down blocks are once again locked and locked-down, including
Section 9.4.3, “Read Device Information” on page 82
IH
summarizes block-locking operations.
, block lock-down protection is disabled—locked-down blocks can be
Block Address
Block Address
Block Address
Address Bus
Setup Write Cycle
0060h
0060h
0060h
Data Bus
Numonyx™ StrataFlash
Block Address
Block Address
Block Address
Address Bus
Confirm Write Cycle
summarizes the details
®
IL
Cellular Memory (M18)
, blocks locked
0001h
00D0h
002Fh
Data Bus
309823-10
April 2008