Specifications

ADT60/AET60 Reference Manual version 1.5 November 2005
Card Status Message for Card Insertion
byte 1 2 3 4 5
Header SW1 SW2 Data length Checksum
01
H
FF
H
01
H
00
H
FF
H
Card Status Message for Card Removal
byte 1 2 3 4 5
Header SW1 SW2 Data length Checksum
01
H
FF
H
02
H
00
H
FC
H
A card status message is transmitted only once for every card insertion or removal event. The reader does
not expect an acknowledge signal from the computer. After transmitting a status message, the reader waits
for the next command from the computer.
NOTE - If the card is being removed from the reader while a card command is being executed, the
reader will transmit a normal response to the computer with the response status bytes indicating the card
removal during command execution (see Appendix B: Response Status Codes).
7.5 Transmission Protocol
The start of a command (to the reader) or a response (from the reader, including the Reset Message and
Card Status Messages) is indicated by the respective party through the transmission of the single byte Start-
of-Text (STX) character with the value 02
H
.
The end of a command or response is indicated through the single byte End-of-Text (ETX) character with
the value 03
H
.
Within the command and response transmission only ASCII characters representing the hexadecimal (hex)
digits 0...F are used. Each byte of a command or response is split into its upper and lower half byte (nibble).
For each half byte is transmitted the ASCII character representing the respective hex digit value. For
example, to transmit the data byte 3A
H
, two bytes are actually sent on the interface, namely, 33
H
(ASCII
code for '3') followed by 41
H
(ASCII code for 'A'):
Data byte value 3A
H
Transmitted values 33
H
= '3' 41
H
= 'A'
 Advanced Card Systems Ltd. Page 13 of 25