User's Manual

ACR1281S
 Advanced Card Systems Ltd. Page 21 of 56
9.4 RDR_to_HOST_Escape
The reader in response to “HOST_to_RDR_Escape” command messages.
Response Frame Format
STX
(0x02)
Bulk-IN Header
(RDR_to_HOST_DataBlock)
abData Checksum ETX
(0x03)
1 Byte 10 Bytes N Bytes 1 Byte 1 Byte
RDR_to_HOST_Escape Format
Offset Field Size Value Description
0 bMessageType 1 83h Indicates that a data block is being
sent from the ACR1281S
1 dwLength
<LSB .. MSB>
4 N Size of abData field. (N Bytes)
5 bSlot 1 Same as
Bulk-OUT
00h for PICC, 01h for ICC
6 bSeq 1 Same as
Bulk-OUT
Sequence number for corresponding
command
7 bStatus 1
8 bError 1
9 bRFU 1 00h Reserved for Future Use
10 abData Byte
array
Data sent from reader.
10. RDR_to_PC_NotifySlotChange Messages
This message is used to report the Card Insertion/Removal Event to the HOST.
Frame Format
STX
(0x02)
Interrupt-In Messages Checksum ETX
(0x03)
1 Byte 2 Bytes 1 Byte 1 Byte