Essel Technology RFID A1, User Manual, Page: 19 / 60

19
3.3.9 AES Initialization Vector Register
Table 3.7
The AES Initialization Vector Registers are two 16-bytes long registers, located at address 0x0128 to 0x0147, with
both read and write access but only after first unlocking the device. These registers are inaccessible when the
module is locked. They can be used as an initialization vector for the first encrypted data block. The byte order in the
memory is from the least significant byte. Their role during data encryption and decryption is described in detail in
chapter 4.2.8 and 4.2.9.
3.3.10 AES Key Register
Table 3.8
The AES Key Registers are two 16-bytes long registers, located at address 0x0148 to 0x0167, with both read and
write access but only after first unlocking the device. These registers are inaccessible when the module is locked.
Both registers contain an AES encryption key which can be used for encryption of the Data Buffer. Their role during
encryption and decryption of the data in the buffer is described in detail in chapter 4.2.8 and 4.2.9.
Register Name
Register Address
Byte Offset 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
Byte Position 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
Factory Default Value 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
Read Function InVec[0] InVec[1] InVec[2] InVec[3] InVec[4] InVec[5] InVec[6] InVec[7] InVec[8] InVec[9] InVec[10] InVec[11] InVec[12] InVec[13] InVec[14] InVec[15]
Write Function
InVec[0] InVec[1] InVec[2] InVec[3] InVec[4] InVec[5] InVec[6] InVec[7] InVec[8] InVec[9] InVec[10] InVec[11] InVec[12] InVec[13] InVec[14] InVec[15]
0x0128,0x0138
AES Initialization Vector
Register Name
Register Address
Byte Offset 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
Byte Position 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
Factory Default Value
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
Read Function Key[0] Key[1] Key[2] Key[3] Key[4] Key[5] Key[6] Key[7] Key[8] Key[9] Key[10] Key[11] Key[12] Key[13] Key[14] Key[15]
Write Function
Key[0] Key[1] Key[2] Key[3] Key[4] Key[5] Key[6] Key[7] Key[8] Key[9] Key[10] Key[11] Key[12] Key[13] Key[14] Key[15]
0x0148, 0x0158
AES Key