User's Manual

Page 7 of 9
U
niversal Terminal UT1
Version 0.03 Oct 2008
\
ACR122S PC-linked Contractless Smart Card Reader
9.0 To deactivate the SAM Interface
STX
(0x02)
Bulk-OUT Header
(HOST_to_RDR_IccPowerOff)
Parameters Checksum ETX
(0x03)
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
STX
(0x02)
Bulk-IN Header
(RDR_to_HOST_SlotStatus)
abData Checksum ETX
(0x03)
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 Bytes)
5 bSlot 1 Same as
Bulk-OUT
Identifies the slot number for this
command
6 bSeq 1 Same as
Bulk-OUT
Sequence number for
corresponding command
7 bStatus 1
8 bError 1
9 bClockStatus 1
Example. To deactivate the slot 0 (default), sequence number = 2.
HOST -> 02 63 00 00 00 00 00 02 00 00 00 [Checksum] 03
RDR -> 02 00 00 03
RDR -> 02 81 00 00 00 00 00 02 00 00 00 [Checksum] 03
ACR122S Command Frame Format
ACR122S Response Frame Format