BioSIMKey - ADT60 Reference Manual
rev 1.0, April, 2002
Advanced Card Systems Ltd.
Page 14 of 26
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 splitted into
its upper and lower halfbyte (nibble). For each halfbyte 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'
