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User Manual, SecureHead USB and UART Interface
Start or End Sentinel: Characters in encoding format which come before the first data character
(start) and after the last data character (end), indicating the beginning and end, respectively, of
data.
Track Separator: A designated character which separates data tracks.
Terminator: A designated character which comes at the end of the last track of data, to separate
card reads.
Card data is only sent to the host on the Interrupt In pipe using an Input Report. The reader will send only
one Input Report per card swipe. If the host requests data from the reader when no data is available, the
reader will send a NAK to the host to indicate that it has nothing to send.
Data Format Setting:
– USB HID Data Format (default setting), Product ID: 2010
- USB Keyboard Format, Product ID: 2030
When the reader is plugged in, the firmware will read the "Data Format Setting" from non-volatile
memory and send current Product ID in enumeration. After the setting is changed, the firmware will
save the setting then do enumeration process.