MX25R1035F Datasheet, PDF (12/87 Pages) Macronix International – Wide Vcc Range, 1M-BIT

ADVANCED INFORMATION
MX25R1035F
II. Additional 8K-bit secured OTP for unique identifier: to provide 8K-bit One-Time Program area for setting
device unique serial number - Which may be set by factory or system maker.
The 8K-bit secured OTP area is composed of two rows of 4K-bit. Customer could lock the first 4K-bit OTP
area and factory could lock the other.
- Security register bit 0 indicates whether the 2^nd 4K-bit is locked by factory or not.
- 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 Definition"
for security register bit definition and table of "Table 3. 8K-bit Secured OTP Definition" for address range
definition.
- To program 8K-bit secured OTP by entering secured OTP mode (with ENSO command), and going through
normal program procedure, and then exiting secured OTP mode by writing EXSO command.
Note: Once lock-down whatever by factory or customer, the corresponding secured area cannot be changed any
more. While in 8K-bit Secured OTP mode, array access is not allowed.
Table 3. 8K-bit Secured OTP Definition
Address range
xxx000~xxx1FF
Size
4096-bit
xxx200~xxx3FF
4096-bit
Lock-down
Determined by Customer
Determined by Factory
P/N: PM2218
REV. 0.00, JAN. 12, 2015
12