JS28F256P30B95A datasheet(39/97 Pages) MICRON

39 / 97 page

August 2008

Datasheet

Order Number: 306666-12

P30

If a block is locked or locked-down during an erase suspend of the same block, the lock

status bits change immediately. However, the erase operation completes when it is

resumed. Block lock operations cannot occur during a program suspend. See Appendix

A, “Write State Machine” on page 87, which shows valid commands during an erase

suspend.

10.2

Selectable One-Time Programmable Blocks

Any of four pre-defined areas from the main array (the four 32-KB parameter blocks

together as one and three adjacent 128 KB main blocks) can be configured as OTP so

further program and erase operations are not allowed. This option is available for top or

bottom parameter devices.

Note:

Please see your local Numonyx representative for details about the Selectable OTP

implementation.

Table 17: Selectable OTP Block Mapping

Density

Top Parameter Configuration

Bottom Parameter Configuration

256-Mbit

blocks 258:255 (parameters)

blocks 3:0 (parameters)

block 254 (main)

block 4 (main)

block 253 (main)

block 5 (main)

block 252 (main)

block 6 (main)

128-Mbit

blocks 130:127 (parameters)

blocks 3:0 (parameters)

block 126 (main)

block 4 (main)

block 125 (main)

block 5 (main)

block 124 (main)

block 6 (main)

64-Mbit

blocks 66:63 (parameters)

blocks 3:0 (parameters)

block 62 (main)

block 4 (main)

block 61 (main)

block 5 (main)

block 60 (main)

block 6 (main)

Notes:

The 512-Mbit devices will have multiple die and selectable OTP areas depending on the placement of the parameter

blocks.

When programming the OTP bits for a Top Parameter Device, the following upper address bits must also be driven

properly: A[Max:17] driven high (VIH) for TSOP and Easy BGA packages, and A[Max:16] driven high (VIH) for QUAD+

SCSP.

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