HID Usage Tables Document 1.1 - C. Scott Ananian

Universal Serial Bus HID Usage Tables 47Usage Multi ModeIndicator 2Indicator OnIndicator FlashIndicator Slow BlinkIndicator Fast BlinkIndicator OffFlash On TimeSlow Blink On TimeSlow Blink Off TimeFast Blink On TimeFast Blink Off TimeUsage IndicatorColor 2Indicator RedIndicator GreenIndicator AmberGeneric IndicatorSystem SuspendExternal PowerConnectedUM – This usage names a logical collection which must be contained inanother collection. The usage attached to the encompassing collection is thenidentified as an indicator that supports multiple illumination modes. In thiscollection one or more of the following Indicator selectors will be found: On,Flash, Slow Blink, Fast Blink, and Off.Sel – Light indicator continuously.Sel – Single, momentary illumination of indicator.Sel – Continuous flashing of the indicator at a slow rate.Sel – Continuous flashing of the indicator at a fast rate.Sel – Turn indicator illumination off.DV – Duration that the indicator is illuminated in flash mode.DV – Duration that the indicator is illuminated in slow blink mode.DV – Duration that the indicator is off in slow blink mode.DV – Duration that the indicator is illuminated in fast blink mode.DV – Duration that the indicator is off in fast blink mode.UM – This collection allows the usage that contains it to be an indicator thatsupports multiple colors. All usages found in this collection will be treated asa Selectors (Sel) where one or more of the following Indicator selectors willbe found: Red, Green, and Amber.Sel – Indicator color set to Red.Sel – Indicator color set to Green.Sel – Indicator color set to Amber. This is typically implemented by assertingRed and Green simultaneously.OOC – This usage identifies an indicator that has no permanently assignedfunction.OOC – Indicates that the system is in a low power state, but is still poweredand retaining some context.OOC – Indicates that a battery-operated system is connected to externalpower.2 An indicator can support Multi Mode features and multiple colors simultaneously. To tie these functionstogether, they can be wrapped in a logical collection where the usage that is attached to the collectiondefines the purpose of the control.Version 1.1 April 8, 1999