ACR122S – Communication Protocol
Version 2.01
www.acs.com.hk
Page 41 of 57
Sectors
(Total 16 sectors. Each
sector consists of 4
consecutive blocks)
Data Blocks
(3 blocks, 16 bytes per
block)
Trailer Block
(1 block, 16 bytes)
Sector 0
00h ~ 02h
03h
Sector 1
04h ~ 06h
07h
..
..
Sector 14
38h ~ 0Ah
3Bh
Sector 15
3Ch ~ 3Eh
3Fh
Table 2
: Mifare 1K Memory Map
Sectors
(Total 32 sectors. Each
sector consists of 4
consecutive blocks)
Data Blocks
(3 blocks, 16 bytes per
block)
Trailer Block
(1 block, 16 bytes)
Sector 0
00h ~ 02h
03h
Sector 1
04h ~ 06h
07h
..
..
Sector 30
78h ~ 7Ah
7Bh
Sector 31
7Ch ~ 7Eh
7Fh
Sectors
(Total 8 sectors. Each
sector consists of 16
consecutive blocks)
Data Blocks
(15 blocks, 16 bytes
per block)
Trailer Block
(1 block, 16 bytes)
Sector 32
80h ~ 8Eh
8Fh
Sector 33
90h ~ 9Eh
9Fh
..
..
Sector 38
E0h ~ EEh
EFh
Sector 39
F0h ~ FEh
FFh
Table 3
: Mifare 4K Memory Map
Note:
Once the authentication is done, all the data blocks of the same sector are free to access. For
example, once the data block 04h is successfully authenticated (Sector 1), the data blocks 04h ~ 07h
are free to access.
1K
Bytes
2K
Bytes
2K
Bytes