ACR122S – Communication Protocol
Version 2.01
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Page 12 of 57
Offset
Field
Size
Value
Description
9
bChainParameter
1
Example:
To activate the slot 0 (default), sequence number = 1, 5 V card.
HOST -> 02 62 00 00 00 00 00 01 01 00 00 [Checksum] 03
RDR -> 02 00 00 03
RDR -> 02 80 0D 00 00 00 00 01 00 00 00 3B 2A 00 80 65 24 B0 00 02 00 82 90 00 [Checksum]
03
The ATR = 3B 2A 00 80 65 24 B0 00 02 00 82; SW1 SW2 = 90 00
5.2. Deactivating the SAM interface
Command Frame Format
STX (02h)
Bulk-OUT Header
(HOST_to_RDR_IccPowerOff)
Parameters Checksum ETX (03h)
1 Byte
10 Bytes
0 Byte
1 Byte
1 Byte
HOST_to_RDR_IccPowerOff Format
Offset
Field
Size
Value
Description
0
bMessageType
1
63h
1
dDwLength
<LSB .. MSB>
4
00000000h Message-specific data length.
5
bSlot
1
00-FFh
Identifies the slot number for this
command. Default=00h
6
bSeq
1
00-FFh
Sequence number for command.
7
abRFU
3
Reserved for Future Use.
Response Frame Format
STX (02h)
Bulk-IN Header
(RDR_to_HOST_SlotStatus)
abData Checksum ETX (03h)
1 Byte
10 Bytes
0 Byte
1 Byte
1 Byte
RDR_to_HOST_DataBlock Format
Offset
Field
Size
Value
Description
0
bMessageType
1
81h
Indicates that a data block is
being sent from the ACR122S.
1
dwLength
<LSB .. MSB>
4
0
Size of
abData
field (0 Byte).
5
bSlot
1
Same as Bulk-OUT Identifies the slot number for this
command.
