Usb Communication - Magtek MICRSafe Technical Reference Manual

5 - USB Communication

5 USB Communication
This device conforms to the USB specification revisions 2.0 and 1.1. This device also conforms to the
Human Interface Device (HID) class specification versions 2.0 and 1.1. The device communicates to the
host as a HID keyboard device. The latest versions of the Windows operating systems come with a
standard Windows USB HID keyboard driver. This section pertains only to the HID Keyboard Emulation
configuration. For character mapping and character conversion, you may reference Appendix E,
Appendix F, and Appendix G for ASCII codes and USB Usage ID definitions.
This is a full speed USB device. This device has a number of programmable configuration properties.
These properties are stored in non-volatile memory. These properties can be configured at the factory or
by the end user. The device has an adjustable endpoint descriptor polling interval value that can be set to
any value in the range of 1ms to 255ms. This property can be used to speed up or slow down the
keyboard data transfer rate. The device also has an adjustable serial number descriptor. More details
about these properties can be found later in this document in the command section.
The device goes into suspend mode when directed to do so by the host. The device wakes up from
suspend mode when directed to do so by the host. The device does not support remote wakeup.
This device is powered from the USB bus. The vendor ID is 0x0801 and the product ID is 0x2251.
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