PF38F5070M0Y0T0 NUMONYX [Numonyx B.V], PF38F5070M0Y0T0 Datasheet - Page 58

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

13.1.4
Figure 20: Block Locking State Diagram
13.1.5
Datasheet
58
WP#
x
x
0
1
1
A/DQ1 A/DQ0
alone. A locked-down block can only be unlocked by issuing the Unlock Block command
with WP# deasserted. To return an unlocked block to locked-down state, a Lock
command (60h/01h) must be issued prior to changing WP# to V
unlocked block can be locked-down by writing the Lock-Down Block command
sequence. Locked-down blocks revert to the locked state upon reset or power up the
device (see
Block Lock Status
The Read Device Identifier command is used to determine a block’s lock status (see
Section 15.2, “Read Device Identifier” on page
addressed block’s lock status; AD0 is the addressed block’s lock bit, while AD1 is the
addressed block’s lock-down bit.
Block Locking During Suspend
Block lock and unlock changes can be performed during an erase suspend. To change
block locking during an erase operation, first issue the Erase Suspend command.
Monitor the Status Register until SR[7] and SR[6] are set, indicating the device is
suspended and ready to accept another command.
Next, write the desired lock command sequence to a block, which changes the lock
state of that block. After completing block lock or unlock operations, resume the erase
operation using the Erase Resume command.
0
0
1
1
1
WP# De-Asserted
WP# Asserted
0
1
1
0
1
Block Status
Unlocked
Locked
Locked-Down
Unlocked
Locked
Figure 20, “Block Locking State Diagram” on page
Unlocked
Unlocked
Unlocked
Unlocked
[000]
[110]
[100]
Unlock
Unlock
Unlock
Numonyx™ StrataFlash
Lock-Down Cmd
Lock-Down Cmd
Cmd
Cmd
Cmd
Lock-Down
Lock
Cmd
Cmd
Lock
Cmd
67). Data bits AD[1:0] display the
Lock-Down Cmd
Lock-Down Cmd
Locked
Locked
Locked
Locked
Locked
-Down
[001]
[011]
[111]
[101]
®
Wireless Memory (L18 AD-Mux)
58).
IL
. A locked or
Order Number: 313295-04
Power-Up/
Power-Up/
Default
Default
Reset
Reset
November 2007