PC48F2000P0VB00 View Datasheet(PDF) - Intel

Part Name

Description

MFG CO.

PC48F2000P0VB00

Intel StrataFlash® Embedded Memory

Intel 

1-Gbit P30 Family

13.1.4

down state, a Lock-Down command must be issued prior to changing WP# to VIL. Locked-down

blocks revert to the locked state upon reset or power up the device (see Figure 32, “Block Locking

State Diagram” on page 70).

Block Lock Status

The Read Device Identifier command is used to determine a block’s lock status (see Section 14.2,

“Read Device Identifier” on page 76). Data bits DQ[1:0] display the addressed block’s lock status;

DQ0 is the addressed block’s lock bit, while DQ1 is the addressed block’s lock-down bit.

Figure 32. Block Locking State Diagram

Power-Up/Reset

Locked

[X01]

Unlocked

[X00]

Locked-

D o w n 4,5

[011]

Hardware

Locked5

[011]

WP# Hardware Control

Software

Locked

[111]

Unlocked

[110]

Software Block Lock (0x60/0x01) or Software Block Unlock (0x60/0xD0)

Software Block Lock-Down (0x60/0x2F)

WP# hardware control

Notes:

1. [a,b,c] represents [WP#, DQ1, DQ0]. X = Don’t Care.

2. DQ1 indicates Block Lock-Down status. DQ1 = ‘0’, Lock-Down has not been issued

to this block. DQ1 = ‘1’, Lock-Down has been issued to this block.

3. DQ0 indicates block lock status. DQ0 = ‘0’, block is unlocked. DQ0 = ‘1’, block is

locked.

4. Locked-down = Hardware + Software locked.

5. [011] states should be tracked by system software to determine difference between

Hardware Locked and Locked-Down states.

13.1.5

Note:

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.

A Lock Block Setup command followed by any command other than Lock Block, Unlock Block,

or Lock-Down Block produces a command sequence error and set Status Register bits SR[4] and

April 2005

70

Intel StrataFlash® Embedded Memory (P30)

Order Number: 306666, Revision: 001

Datasheet

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