S29GL01GS datasheet(19/118 Pages) INFINEON

19 / 118 page

Datasheet

001-98285 Rev. *T

2023-07-17

128 Mb/256 Mb/512 Mb/1 Gb GL-S MIRRORBIT™ Flash

Parallel, 3.0 V

Data protection

• The addresses can be loaded in any order but all 4 words are required for a successful match to occur.

• The sector addresses and word line addresses are compared while the password address/data are loaded. If

the sector address don’t match than the error will be reported at the end of that write cycle. The status register

will return to the ready state with the program status bit set to ‘1’, program status register bit set to ‘1’, and

write buffer abort status bit set to ‘1’ indicating a failed programming operation. It is a failure to change the

state of the PPB lock bit because it is still protected by the lack of a valid password. The data polling status will

remain active, with DQ7 set to the complement of the DQ7 bit in the last word of the password unlock command,

and DQ6 toggling. RY/BY# will remain LOW.

• The specific address and data are compared after the program buffer to flash command has been given. If they

don’t match to the internal set value than the status register will return to the ready state with the program

status bit set to ‘1’ and program status register bit set to ‘1’ indicating a failed programming operation. It is a

failure to change the state of the PPB lock bit because it is still protected by the lack of a valid password. The

data polling status will remain active, with DQ7 set to the complement of the DQ7 bit in the last word of the

password unlock command, and DQ6 toggling. RY/BY# will remain LOW.

• The device requires approximately 100 µs for setting the PPB Lock after the valid 64-bit password is given to the

device.

• The password unlock command cannot be accepted any faster than once every 100 µs ± 20 µs. This makes it

take an unreasonably long time (58 million years) for a hacker to run through all the 64-bit combinations in an

attempt to correctly match a password. The EA status checking methods may be used to determine when the

EAC is ready to accept a new password command.

• If the password is lost after setting the password mode lock bit, there is no way to clear the PPB lock.

S29GL01GS Datasheet(PDF) 19 Page - Infineon Technologies AG