ACR3901T-W1 – Reference Manual
Version 1.02
www.acs.com.hk
Page 19 of 100
6.1.5.1.
Card Power On
This command sends a power on request to the reader.
Command Format
Offset
Field
Size
Value
Description
0
bMessageType
1
62h
-
1
LEN1 LEN2 (wLength)
2
0100h
Number of extra bytes starting from
the next field for this message, and is
expressed in two bytes, and LEN1 is
LSB while LEN2 is MSB
3
CSUM (wChecksum)
1
63h
CSUM means the XOR values of all
bytes in the command
Response Data Format
Offset
Field
Size
Value
Description
0
bMessageType
1
12h
-
1
LEN1 LEN2 (wLength)
2
Number of extra bytes starting from
the next field for this message, and is
expressed in two bytes long, and
LEN1 is LSB while LEN2 is MS
3
N byte ATR
N
-
Card Answer-To-Reset
3+N
CSUM (wChecksum)
1
-
CSUM means the XOR values of all
bytes in the command
Response Data Format (Error)
Offset
Field
Size
Value
Description
0
bMessageType
1
92h
-
1
LEN1 LEN2 (wLength)
2
0200h
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.
3
Error Code (bErrorCode)
1
-
Error Code. Refer to Appendix A
4
CSUM (wChecksum)
1
-
CSUM means the XOR values of all
bytes in the command
Example:
Request =
62
01 00 63
Response =
12
14 00 3B BE 11 00 00 41 01 38 00 00 00 00 12 34 56 78 01
90 00 73
ATR = 3B BE 11 00 00 41 01 38 00 00 00 00 12 34 56 78 01