MX25L3273E Datasheet, PDF (11/86 Pages) Macronix International – 32M-BIT [x 1/x 2/x 4] CMOS MXSMIO® (SERIAL MULTI I/O) FLASH MEMORY

MX25L3273E
II. Additional 4K-bit secured OTP for unique identifier: to provide 4K-bit One-Time Program area for setting
device unique serial number - Which may be set by factory or system maker.
- 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 com-
mand.
- 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 "Table 8. Security Register Defini-
tion" for security register bit definition and table of "Table 3. 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 Secured
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: PM1906
REV. 1.1, NOV. 07, 2013
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