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Example:
HOST=>READER: 0x43 – MFU_READ_SIGNATURE
READER=>HOST: 0x00 – ACK byte
0x43 – related command code MFU_READ_SIGNATURE
0x01 0x2e 0x41 0x22 0x43 0x11 0x8e 0x20
0x31 0x38 0x20 0x32 0x30 0x31 0x39 0x41
0x81 0x23 0x42 0x28 0x33 0x01 0x8e 0x72
0x31 0x35 0x3a 0x33 0x35 0x3a 0x30 0x33 – signature bytes
3.4.5 Write signature (0x44)
This command writes the signature information to the Mifare Ultralight Nano TAG. It takes as arguments
relative page location of the signature part to be written and four bytes of signature value to be written.
Command description
Argument
Size
Value
Description
Command ID
1
0x44
MF
U
_
WRITE
_
SIGNATURE
Relative page
address
1
X
Relative page location of the signature part to be written
Bytes to write 4
XXX
B
ytes of signature value to be written to the specified
relative page address
Response
description
ACK
1
0x00
Command ID
1
0x44
MF
U
_
WRITE
_
SIGNATURE
Example:
HOST=>READER: 0x44 – MFU_WRITE_SIGNATURE
0x00 – relative page number 0
0x35 0x3a 0x30 0x33 – 4 bytes to write
READER=>HOST: 0x00 – ACK byte
0x44 – related command code MFU_WRITE_SIGNATURE
3.4.6 Lock signature (0x45)
This command locks the signature temporarily or permanently based on the information provided in the
API. The locking and unlocking of the signature can be performed using this command if the signature is
not locked or temporary locked. If the signature is permanently locked, then unlocking can’t be done.
Command description
Argument
Size
Value
Description
Command ID
1
0x45
MF
U
_
LOCK_SIGNATURE
Lock mode 1
X
0x00
–
Unlock
0x01 – Lock
0x02 – Permanent lock
Response
description
ACK
1
0x00
Command ID
1
0x45
MF
U
_
LOCK_SIGNATURE
Example: