ACR3901U-S1 – Reference Manual
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Page 24 of 96
6.1.5.5.
APDU2 Command (From FW v1.20 and later)
This command sends an APDU command which support extended APDU to the reader.
Command Format
Offset
Field
Size
Value
Description
0
bMessageType
1
67h
-
1
LEN1 LEN2 (wLength)
2
-
Number of extra bytes starting from
the next field for this message. It is
expressed in two bytes long. LEN1 is
LSB while LEN2 is MSB. (Maximum
length is 263)
3
Data
Param
1
-
Parameter:
Short APDU level
00h – default
Extended APDU level
00h – the command APDU begins and
ends with this command.
01h – the command APDU begins with
this command and continues in next
APDU command.
02h – this Data field continues a
command APDU and ends the APDU
command.
03h – this Data field continues a
command APDU and another block is
to follow.
10h – empty Data field, continuation of
response APDU is expected in the
next Response.
4
APDU CMD
N
-
APDU Command
(Maximum length is 261)
4+N
CSUM (wChecksum)
1
-
CSUM means the XOR values of all
bytes in the Data
