PF38F5050M0Y0CGA Micron Technology Inc, PF38F5050M0Y0CGA Datasheet - Page 72
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PF38F5050M0Y0CGA
Manufacturer Part Number
PF38F5050M0Y0CGA
Description
Manufacturer
Micron Technology Inc
Datasheet
1.PF38F5050M0Y0CGA.pdf
(102 pages)
Specifications of PF38F5050M0Y0CGA
Operating Supply Voltage (max)
1.95V
Operating Temperature (max)
85C
Mounting
Surface Mount
Lead Free Status / RoHS Status
Compliant
- Current page: 72 of 102
- Download datasheet (2Mb)
Figure 31: Block Locking State Diagram
13.1.1
13.1.2
13.1.3
Datasheet
72
Lock
All blocks default to locked (state [x01]) after initial power-up or reset. Locked blocks
are fully protected from alteration. Attempted program or erase operations to a locked
block will return an error in SR[1]. Unlocked blocks can be locked by using the Lock
Block command sequence. Similarly, a locked block’s status can be changed to
unlocked or lock-down using the appropriate software commands.
Unlock
Unlocked blocks (states [x00] and [110]) can be programmed or erased. All unlocked
blocks return to the locked state when the device is reset or powered-down. An
unlocked block’s status can be changed to the locked or locked-down state using the
appropriate software commands. A locked block can be unlocked by writing the Unlock
Block command sequence if the block is not locked-down.
Lock-Down
Locked-down blocks (state [011]) offer the user an additional level of write protection
beyond that of a regular locked block. A block that is locked-down cannot have it’s
state changed by software if WP# is asserted. A locked or unlocked block can be
locked-down by writing the Lock-Down Block command sequence. If a block was set to
locked-down, then later changed to unlocked, a Lock-Down command should be issued
prior asserting WP# will put that block back to the locked-down state. When WP# is
deasserted, locked-down blocks are changed to the locked state and can then be
unlocked by the Unlock Block command.
Power-Up/Reset
Notes:
1. [a,b,c] represents [WP#, D1, D0]. X = Don’t Care.
2. D1 indicates block Lock-down status. D1 = ‘0’, Lock-down has not been issued to
3. D0 indicates block lock status. D0 = ‘0’, block is unlocked. D0 = ‘1’, block is locked.
4. Locked-down = Hardware + Software locked.
5. [011] states should be tracked by system software to determine difference between
this block. D1 = ‘1’, Lock-down has been issued to this block.
Hardware Locked and Locked-Down states.
Unlocked
Locked
[X01]
[X00]
Software Block Lock (0x60/0x01) or Software Block Unlock (0x60/0xD0)
Software Block Lock-Down (0x60/0x2F)
WP# hardware control
Software
Locked-
Down
Locked
[111]
[011]
Numonyx™ Wireless Flash Memory (W18)
Numonyx™ Wireless Flash Memory (W18)
4,5
WP# Hardware Control
Order Number: 290701-18
Hardware
Unlocked
Locked
[011]
[110]
November 2007
5
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