ACS ACR122L, User Manual

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ACR122L – Communication Protocol
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Page 49 of 57
Table 7 : Mifare Ultralight Memory Map
6.18.3. Accessing Mifare Ultralight C tags
Typical sequence may be:
1. Scanning the tags in the field (Polling).
2. Authentication.
3. Read/Write the memory of the tag.
4. Halt the tag (optional).
Step 1. Polling for the MIFARE Ultralight C Tags, 106 kbps
HOST -> 02 6F 09 00 00 00 00 01 00 00 00
HOST -> FF 00 00 00 04 D4 4A
01 00 [Checksum] 03
RDR -> 02 00 00 03 (Waiting the Tag)
RDR -> 02 80 11 00 00 00 00 01 01 00 00
RDR -> D5 4B 01 01 00 44 00 07 04 6E 0C A1 BF 02 84 90 00 [Checksum] 03
In which,
Number of Tag found = [01]; Target number = 01
SENS_RES = 00 44; SEL_RES = 00 ,
Length of the UID = 7; UID = 04 6E 0C A1 BF 02 84
Operation Finished = 90 00
Byte Number 0 1 2 3 Page
Serial Number SN0 SN1 SN2 BCC0 0
Serial Number SN3 SN4 SN5 SN6 1
Internal / Lock BCC1 Internal Lock0 Lock1 2
OTP OPT0 OPT1 OTP2 OTP3 3
Data read/write Data0 Data1 Data2 Data3 4
Data read/write Data4 Data5 Data6 Data7 5
Data read/write Data8 Data9 Data10 Data11 6
Data read/write Data12 Data13 Data14 Data15 7
Data read/write Data16 Data17 Data18 Data19 8
Data read/write Data20 Data21 Data22 Data23 9
Data read/write Data24 Data25 Data26 Data27 10
Data read/write Data28 Data29 Data30 Data31 11
Data read/write Data32 Data33 Data34 Data35 12
Data read/write Data36 Data37 Data38 Data39 13
Data read/write Data40 Data41 Data42 Data43 14
Data read/write Data44 Data45 Data46 Data47 15
512 bits
or
64 Bytes