HID Usage Tables Document 1.1 - C. Scott Ananian

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16 Universal Serial Bus HID Usage TablesMotion Wakeupbe tilted. Intermediate positions can also be decoded if the hardware allowstwo switches to be reported simultaneously.DF – Enables the generation of a USB remote wakeup when the devicedetects motion. Motion Wakeup is always enabled after a USB Reset event isdetected by the device. Then host can also assume that the state of the MotionWakeup flag is maintained while the device is suspended.For example, a mouse may generate a remote wakeup when a button ispressed or when it is moved. For some implementations, a laptop user maywant to disable the wakeup on motion because it draws more power.Start OOC - Session start button. Initiates a session within an application .SelectOOC - Application option select button. Selects application configurationoptions.4.4 Vector UsagesFor the usages Vx, Vy, Vz, Vbrx, Vbry, Vbrz, and Vno, Units are always required to determine the meaningof the vector. Rotational vectors are also identified by Units. These usages are used when declaring velocity,acceleration, force, electric field, and similar kinds of vectors in the respective direction and frame ofreference.VxVyVzVbrxVbryVbrzVnoDV – A vector in the X direction. Report values should increase as the vectorincreases in the positive X direction (from left to right). Negative valuesrepresent vectors in the negative X direction.DV – A vector in the Y direction. Report values should increase as the vectorincreases in the positive Y direction (from far to near). Negative valuesrepresent vectors in the negative Y direction.DV – A vector in the Z direction. Report values should increase as the vectorincreases in the positive Z direction (from high to low). Negative valuesrepresent vectors in the negative Z direction.DV – A vector in the X direction relative to the body of an object. Reportvalues should increase as the vector increases in the positive X direction(forward). Negative values represent vectors in the negative X direction. X isthe “forward” axis for an object.DV – A vector in the Y direction relative to the body of an object. Reportvalues should increase as the vector increases in the positive Y direction (tothe right from an observer facing forward on the object). Negative valuesrepresent vectors in the negative Y direction.DV – A vector in the Z direction relative to the body of an object. Reportvalues should increase as the vector increases in the positive Z direction(down from an observer facing forward on the object). Negative valuesrepresent vectors in the negative Z direction.DV– A non oriented vector or value. The units define a physical measurementnot related to a specific axis or orientation. An example would be pressure ortemperature.Version 1.1 April 8, 1999
Universal Serial Bus HID Usage Tables 174.5 System ControlsSystem controls are a special category of usages that affect the system as a whole. They are pulled togetherin a System Control collection to make them easy for system software to identify.System ControlSystem Context MenuSystem Main MenuSystem App MenuSystem Menu HelpSystem Menu ExitSystem Menu SelectSystem Menu RightSystem Menu LeftSystem Menu UpSystem Menu DownCA – A application-level collection that contains system-software-specificusages. System software will search specifically for this collection for thosecontrols that affect the system globally.OSC – Evokes a context-sensitive menu.OSC – Evokes the OS main-level selection menu.OSC – Displays an application-specific menu.OSC – Displays the help menu.OSC – Exits a menu.OSC – Selects a menu item.RTC – Menu select right.RTC – Menu select left.RTC – Menu select up.RTC – Menu select down.4.5.1 Power ControlsPower controls can step the system through the following states: Full Power, Low Power, and Power Down.The state diagram is shown in the following figure.Figure 1: System Power StatesSystem SleepFullPowerSystem Power DownLowPowerSystem Wake UpPowerDownPower control usages found in a System Control collection affect system level power. Those declaredoutside of a System Collection affect device level power.System Power DownSystem SleepOSC – Asserted when the intended action is to initiate system-wide powerdown now from Full Power or Sleep states.OSC – Asserted when the intended action is to initiate system-wide lowpower mode now. If the system is already in the Low Power state, there is noVersion 1.1 April 8, 1999
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HID Usage Tables Document 1.1 - C. Scott Ananian

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