ACS ACR1283L - Manual (Page 17)

ACR1283L – Reference Manual [email protected]
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5.2.2.4. RDR_to_PC_Parameters
This message is sent by ACR1283L in response to PC_to_RDR_GetParameters,
PC_to_RDR_ResetParameters and PC_to_RDR_SetParameters messages.
Offset Field Size Value Description
0 bMessageType 1 82h
1 dwLength 4 Size of extra bytes of this message.
5 bSlot 1 Same value as in Bulk-OUT message.
6 bSeq 1 Same value as in Bulk-OUT message.
7 bStatus 1
Slot status register as defined in CCID
section 4.2.1.
8 bError 1
Slot error register as defined in CCID
section 4.2.1 and this specification section
5.2.8.
9 bProtocolNum 1
Specifies what protocol data structure
follows.
00h = Structure for protocol T=0
01h = Structure for protocol T=1
The following values are reserved for
future use:
80h = Structure for 2-wire protocol
81h = Structure for 3-wire protocol
82h = Structure for I2C protocol
10 abProtocolDataStructure Byte
array
Protocol Data Structure as summarized in
section 5.2.3.
5.3. Contactless Smart Card Protocol
5.3.1. ATR Generation
If the reader detects a PICC, an ATR is sent to the PCSC driver for identifying the PICC.
5.3.1.1. ATR Format for ISO 14443 Part 3 PICCs
Byte Value (Hex) Designation Description
0 3B Initial Header
1 8N T0
Higher nibble 8 means: no TA1, TB1, TC1 only TD1
is following.
Lower nibble N is the number of historical bytes
(HistByte 0 to HistByte N-1)
2 80 TD1
Higher nibble 8 means: no TA2, TB2, TC2 only TD2
is following.
Lower nibble 0 means T = 0
3 01 TD2
Higher nibble 0 means no TA3, TB3, TC3, TD3
following.
Lower nibble 1 means T = 1