User's Manual

W1981-PLUS Contact Smart Card Reader User Manual
Watchdata Technologies Pte Ltd
Admirax 8 Admiralty Street #02‐07/08,
Singapore 757438
www.watchdata.com
3. Communication Protocol
Communication protocol between the pc and the reader is compliant with the CCID protocol.
There are some examples that can make the users understood how to send the APDU command
to the card through the reader .
Note: All the numbers in the commands are hexadecimal.
3.1 APDU command format from the PC to the reader
Information
field
Identifier
Length
Description
The head of
APDU ommand
Type
1
CCID Command
Length
4
Length of Abdata
Slot
1
Code of slot
Bseq
1
Code of result
bBwi
1
Time of block waiting
Level Param
2
Communication level parameter