User's Manual

ACR122L-ACS Design Specification
Version 0.03 19/05/2010
Page
14
of
50
ACR122L
-
ACS
To deactivate the SAM Interface
ACR122L Command Frame Format
STX Bulk-OUT Header
(HOST_to_RDR_IccPowerOff)
Parameters Checksum ETX
1 Byte 10 Bytes 0 Byte 1 Byte 1 Byte
For SAM Interface 1, STX = 0x02 and ETX = 0x03
For SAM Interface 2, STX = 0x12 and ETX = 0x13
For SAM Interface 3, STX = 0x22 and ETX = 0x23
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
ACR122L Response Frame Format
STX Bulk-IN Header
(RDR_to_HOST_SlotStatus)
abData Checksum ETX
1 Byte 10 Bytes 0 Byte 1 Byte 1 Byte
For SAM Interface 1, STX = 0x02 and ETX = 0x03
For SAM Interface 2, STX = 0x12 and ETX = 0x13
For SAM Interface 3, STX = 0x22 and ETX = 0x23
RDR_to_HOST_DataBlock Format
Offset Field Size Value Description
0 bMessageType 1 81h Indicates that a data block is being sent
from the ACR122L
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