mx25l3255d Macronix International Co., mx25l3255d Datasheet - Page 16

• Manufacturer Part Number: mx25l3255d
• Description: Security Serial Flash
• Manufacturer: Macronix International Co.

P/N: PM1431
Note 1: The count base is 4-bit for ADD(2) and Dummy(2) because of 2 x I/O. And the MSB is on SI/SIO1 which is different from
Note 2: ADD=00H will output the manufacturer ID first and ADD=01H will output device ID first.
Note 3: It is not allowed to adopt any other code which is not in the above command definition table.
COMMAND
2nd byte
3rd byte
4th byte
1st byte
Action
(byte)
1 x I/O condition.
ENSO (enter
OTP mode
the 4K-bit
B1 (hex)
Secured
secured
to enter
OTP)
EXSO (exit
OTP mode
the 4K-bit
C1 (hex)
Secured
secured
to exit
OTP)
(read security
to read value
of security
RDSCUR
2B (hex)
register)
register
lock-down bit
as "1" (once
lock-down,
WRSCUR
cannot be
to set the
updated)
2F (hex)
register)
security
(write
16
to output RY/
to enable SO
to output RY/
(enable SO
BY# during
CP mode
70 (hex)
ESRY
BY#)
to output RY/
to disable SO
to output RY/
MX25L3255D
(disable SO
BY# during
CP mode
80 (hex)
DSRY
BY#)
REV. 0.03, MAR. 13, 2009