mx25l1635dzni-10g Macronix International Co., mx25l1635dzni-10g Datasheet - Page 24

• Manufacturer Part Number: mx25l1635dzni-10g
• Description: Serial Flash Memory
• Manufacturer: Macronix International Co.

Table 7. ID Definitions
(19) Enter Secured OTP (ENSO)
The ENSO instruction is for entering the additional 512-bit secured OTP mode. The additional 512-bit secured OTP
is independent from main array, which may use to store unique serial number for system identifier. After entering the
Secured OTP mode, and then follow standard read or program, procedure to read out the data or update data. The
Secured OTP data cannot be updated again once it is lock-down.
The sequence of issuing ENSO instruction is: CS# goes low→sending ENSO instruction to enter Secured OTP
mode→ CS# goes high.
Please note that WRSR/WRSCUR commands are not acceptable during the access of secure OTP region, once se-
curity OTP is lock down, only read related commands are valid.
(20) Exit Secured OTP (EXSO)
The EXSO instruction is for exiting the additional 512-bit secured OTP mode.
The sequence of issuing EXSO instruction is: CS# goes low→sending EXSO instruction to exit Secured OTP
mode→CS# goes high.
P/N: PM1374
two dummy bytes and one bytes address (A7~A0). After which, the Manufacturer ID for MXIC (C2h) and the Device
ID are shifted out on the falling edge of SCLK with most significant bit (MSB) first as shown in figure 31. The Device
ID values are listed in Table 7 of ID Definitions in next page. If the one-byte address is initially set to 01h, then the
device ID will be read first and then followed by the Manufacturer ID. The Manufacturer and Device IDs can be read
continuously, alternating from one to the other. The instruction is completed by driving CS# high.
REMS/REMS2/REMS4/
RDID Command
RES Command
Command
manufacturer ID
manufacturer ID
C2
C2
24
memory type
electronic ID
device ID
24
24
24
MX25L1635D
memory density
REV. 1.7, MAR. 30, 2009
15