User's Manual

Page 6 of 9
U
niversal Terminal UT1
Version 0.03 Oct 2008
\
ACR122S PC-linked Contractless Smart Card Reader
8.0 To activate the SAM Interface
STX
(0x02)
Bulk-OUT Header
(HOST_to_RDR_IccPowerOn)
Parameters Checksum ETX
(0x03)
1 Byte 10 Bytes 0 Byte 1 Byte 1 Byte
HOST_to_RDR_IccPowerOn Format
Offset Field Size Value Description
0 bMessageType 1 62h
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 bPowerSelect 1 00h, 01h,
02h, or 03h
Voltage that is applied to the ICC
00h – Automatic Voltage
Selection
01h – 5.0 volts
02h – 3.0 volts
03h – 1.8 volts
8 abRFU 2 Reserved for Future Use
STX
(0x02)
Bulk-IN Header
(RDR_to_HOST_DataBlock)
abData Checksum ETX
(0x03)
1 Byte 10 Bytes N Bytes
(ATR)
1 Byte 1 Byte
RDR_to_HOST_DataBlock Format
Offset Field Size Value Description
0 bMessageType 1 80h Indicates that a data block is
being sent from the ACR122S
1 dwLength
<LSB .. MSB>
4 N Size of abData field. (N 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 bChainParameter 1
ACR122S Command Frame Format
ACR122S Response Frame Format