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Section 4. USB Communications
69
Item Value(Hex)
Usage (Card encode type) 09 38
Report Count (7) 95 07
Input (Data, Variable, Absolute, Bit
Field)
81 02
Usage (Track 1 data) 09 30
Report Count (110) 95 6E
Input (Data, Variable, Absolute,
Buffered Bytes)
82 02 01
Usage (Track 2 data) 09 31
Report Count (110) 95 6E
Input (Data, Variable, Absolute,
Buffered Bytes)
82 02 01
Usage (Track 3 data) 09 32
Report Count (110) 95 6E
Input (Data, Variable, Absolute,
Buffered Bytes)
82 02 01
Usage (Command message) 09 20
Report Count (24) 95 18
Feature (Data, Variable, Absolute,
Buffered Bytes)
B2 02 01
End Collection C0
CARD DATA
Card data is only sent to the host on the Interrupt In pipe using an Input Report. The device will
send only one Input Report per card swipe. If the host requests data from the device when no
data is available, the device will send a Nak to the host to indicate that it has nothing to send.
When a card is swiped, the Input Report will be sent even if the data is not decodable. The
following table shows how the input report is structured.
Offset Usage Name
0 Track 1 decode status
1 Track 2 decode status
2 Track 3 decode status
3 Track 1 data length
4 Track 2 data length
5 Track 3 data length
6 Card encode type
7 – 116 Track 1 data
117 – 226 Track 2 data
227 - 336 Track 3 data