ACS ACR122T, Programming Manual

Page: 11 / 45

ACR122T – Application Programming Interface
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Version 2.02
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Page 11 of 45
4.0. PICC Commands for General Purposes
4.1. Get Data
The “Get Data command” will return the serial number or ATS of the “Connected PICC.”
Get UID APDU Format (5 Bytes)
Command Class INS P1 P2 Le
Get Data FFh CAh
00h
01h
00h
00h
(Full Length)
Get UID Response Format (UID + 2 Bytes) if P1 = 0x00h
Response Data Out
Result
UID
(LSB)
- -
UID
(MSB)
SW1 SW2
Get ATS of a ISO 14443 A card (ATS + 2 Bytes) if P1 = 0x01h
Response Data Out
Result ATS SW1 SW2
Response Codes
Results SW1 SW2 Meaning
Success 90 00h The operation completed successfully.
Error 63 00h The operation failed.
Error 6A 81h Function not supported.
Example:
1. To get the serial number of the “connected PICC”
UINT8 GET_UID[5]={0xFFh, 0xCAh, 0x00h, 0x00h, 0x04h};
2. To get the ATS of the “connected ISO 14443 A PICC”
UINT8 GET_ATS[5]={0xFFh, 0xCAh, 0x01h, 0x00h, 0x04h};