ACS AET60 BioCARDKey, Reference Manual

Page: 20 / 24

7.2.3. EXCHANGE_APDU
To exchange an APDU (Application Protocol Data Unit) command/response pair between the MCU
card inserted in the BioCARDKey and the host computer.
Command format
Instructio
n Code
Data
length
Data
LEN CLA INS P1 P2 Lc BYTE
1
...2 ... BYTE
N
Le
A0
H
LEN Length of APDU command data, N, + 6 (0 < N
≤
MAX_R)
CLA APDU instruction class byte
INS APDU instruction
P1 APDU parameter byte 1
P2 APDU parameter byte 2
Lc APDU command data length
BYTE x APDU command data
Le Expected APDU response data length (Le = 0 means no data is expected from the
card)
NOTE: With the T=0 communication protocol it is not possible to transmit data to the card and from
the card in a single command-response pair. Hence, only either Lc or Le can be
greater than 0 in an
EXCHANGE_APDU command when a T=0 card is in the reader.
If both parameters have a value greater than 0, the BioCARDKey does not execute
the command and returns an error status.
Response data format
BYTE
1
... ... BYTE
N
SW1 SW2
BYTE x Response data from card (if any)
SW1, SW2 Status code returned by the card.
Document Title Here
Document Title Here
Document Title Here
AET60 Reference Manual
Version 1.7
Page 20 of 24
info@acs.com.hk
www.acs.com.hk