mx25l1655d Macronix International Co., mx25l1655d Datasheet - Page 11

• Manufacturer Part Number: mx25l1655d
• Description: Security Serial Flash
• Manufacturer: Macronix International Co.

II. Additional 512-bit secured OTP for unique identifier: to provide 512-bit one-time program area for setting de-
P/N: PM1430
Table 2. 512-bit Secured OTP Definition
vice unique serial number - Which may be set by factory or system customer. Please refer to table 2. 512-bit
secured OTP definition.
- Security register bit 0 indicates whether the chip is locked by factory or not.
- To program the 512-bit secured OTP by entering 512-bit secured OTP mode (with ENSO command), and go-
ing through normal program procedure, and then exiting 512-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 security
register bit definition and table of "512-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 512-bit se-
cured OTP mode, array access is not allowed.
Address range
xxxx00~xxxx0F
xxxx10~xxxx3F
128-bit
384-bit
Size
ESN (electrical serial number)
Standard Factory Lock
11
N/A
MX25L1655D
Determined by customer
Customer Lock
REV. 1.2, MAR. 11, 2009