User manual

Copyright © 2011, Unitech America Inc. All rights reserved.
Page 22 of 61
MS246 User Manual
8. Data Format
The USB version of the reader can be operated in two different modes:
- HID Unitech mode (herein referred to as “HID mode”), Product ID: 2010.
- HID with Keyboard Emulation (herein referred to as “KB mode”), Product ID: 2030.
When the reader is operated in the HID mode, it behaves like a vendor defined HID
device. A direct communication path can be established between the host application and
the reader without interference from other HID devices.
8.1 Level 1 and level 2 Standard Mode Data Output Format
USB HID Output Format
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.