MX25L12845EZNI 查看數據表（PDF） - Macronix International

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MX25L12845EZNI

128M-BIT [x 1/x 2/x 4] CMOS MXSMIO® (SERIAL MULTI I/O) FLASH MEMORY

Macronix International 

MX25L12845E

Table 2. Protected Area Sizes

Status bit

BP3

BP2

BP1

0

0

0

0

0

0

0

0

1

0

0

1

0

1

0

0

1

0

0

1

1

0

1

1

1

0

0

1

0

0

1

0

1

1

0

1

1

1

0

1

1

0

1

1

1

1

1

1

Protection Area

BP0 128Mb

0 0 (none)

1 1 (2 blocks, block 254th-255th)

0 2 (4 blocks, block 252nd-255th)

1 3 (8 blocks, block 248th-255th)

0 4 (16 blocks, block 240th-255th)

1 5 (32 blocks, block 224th-255th)

0 6 (64 blocks, block 192nd-255th)

1 7 (128 blocks, block 128th-255th)

0 8 (256 blocks, all)

1 9 (256 blocks, all)

0 10 (256 blocks, all)

1 11 (256 blocks, all)

0 12 (256 blocks, all)

1 13 (256 blocks, all)

0 14 (256 blocks, all)

1 15 (256 blocks, all)

Note: The device is ready to accept a Chip Erase instruction if, and only if, all Block Protect (BP3, BP2, BP1, BP0) are 0.

II. Additional 4K-bit secured OTP for unique identifier: to provide 4K-bit One-Time Program area for setting de-

vice unique serial number - Which may be set by factory or system maker. Please refer to Table 3. 4K-bit Se-

cured OTP Definition.

- Security register bit 0 indicates whether the chip is locked by factory or not.

- To program the 4K-bit secured OTP by entering 4K-bit secured OTP mode (with ENSO command), and going

through normal program procedure, and then exiting 4K-bit secured OTP mode by writing EXSO command.

- Customer may lock-down the customer lockable secured OTP by writing WRSCUR(write security register)

command to set customer lock-down bit1 as "1". Please refer to table of "Security Register Definition" for secu-

rity register bit definition and table of "4K-bit Secured OTP Definition" for address range definition.

- Note: Once lock-down whatever by factory or customer, it cannot be changed any more. While in 4K-bit Se-

cured OTP mode, array access is not allowed.

Table 3. 4K-bit Secured OTP Definition

Address range

xxx000~xxx00F

xxx010~xxx1FF

Size

128-bit

3968-bit

Standard Factory Lock

ESN (electrical serial number)

N/A

Customer Lock

Determined by customer

P/N: PM1428

REV. 1.9, SEP. 06, 2013

11

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