User's Manual

ACR122L
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USB
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ACS
Hint: Use the APDU “FF CA 01 00 00” to distinguish the ISO14443A-4 and ISO14443B-4 PICCs, and
retrieve the full ATS if available. ISO14443A-3 or ISO14443B-3/4 PICCs do have ATS returned.
APDU Command = FF CA 01 00 00
APDU Response = 06 75 77 81 02 80 90 00
ATS = {06 75 77 81 02 80}
E.g 2. ATR for ST19XRC8E = { 3B 8C 80 01 50 12 23 45 56 12 53 54 4E 33 81 C3 55}
// 12 bytes of ATQB, No CRC-B
ATQB = {50 12 23 45 56 12 53 54 4E 33 81 C3}
6.2. Pseudo APDUs for Contactless Interface
ACR128MiniU comes with two primitive commands for this purpose. <Class 0xFF>
6.2.1. Direct Transmit via ScardTransmit
To send a Pseudo APDU (PN532 and TAG Commands), and the Response Data will be returned.
Table 1.0A: Direct Transmit Command Format (Length of the PN532_TAG Command + 5 Bytes)
Command Class INS P1 P2 Lc Data In
Direct
Transmit
0xFF 0x00 0x00 0x00 Number
of Bytes
to send
PN532_TAG
Command
Lc: Number of Bytes to Send (1 Byte)
Maximum 255 bytes.
Data In: PN532_TAG Command
The data to be sent to the PN532 and Tag.
Table 1.0B: Direct Transmit Response Format (Response Length + 2 Bytes)
Response Data Out
Result PN532_TAG
Response
SW1 SW2
Data Out: PN532_TAG Response
PN532_TAG Response returned by the reader.
Data Out: SW1 SW2