Cypress EZ-USB HX2LP, CY7C656xx manual Port Indicator Color Definitions in Manual Mode Port State

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PRELIMINARYCY7C656xx

The LED control lines can also be modulated with a square wave for power conservation in systems using batteries. Alone with this there is also a polarity control for these pins, see section 9.3.

In manual mode, the indicators are under the control of the host, which can turn on one of the LEDs, or leave them off. This is done by a system software USB Hub class request. Blinking of the LEDs is supported in Manual Mode. The port indicators allow the user to intervene on any error detection. For example, when babble is detected on plugging in a defective device, or on occurrence of an overcurrent condition, the port indicators corresponding to the downstream port will blink green or only light the amber LED, respectively.

Note:

Table 5-2displays the color definition of the indicators when CY7C656xx is in Manual Mode.[1]

Table 5-2. Port Indicator Color Definitions in Manual Mode

Color Definition

Port State

 

 

Off

Not operational

 

 

Amber

Error condition

 

 

Green

Fully Operational

 

 

Blinking Off/Green

Software Attention

 

 

Blinking Off/Amber

Hardware Attention

 

 

Blinking Green/Amber

Reserved

 

 

1.Information presented in Table 5-1and Table 5-2is from USB 2.0 specification Tables 11-6 and 11-7, respectively.

Document #: 38-08037 Rev. *D

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Contents Features IntroductionCypress Semiconductor Corporation Block Diagrams CY7C65640B Block DiagramCY7C65630/CY7C65620 Block Diagram Applications Functional OverviewUpstream Port Power SwitchingPort Indicators Over-current DetectionPort Indicator Color Definitions in Manual Mode Port State Pin Configuration Pin Quad Flat Pack No Leads 8 mm x 8 mm2Pin Description Table Downstream D- Signal Downstream D+ SignalOvercurrent Condition Detection Input. Default is Active Device Descriptor Default DescriptorsConfiguration Descriptor Interface DescriptorEndpoint Descriptor9,10 Endpoint DescriptorInterface Descriptor9,10 Device Qualifier DescriptorHub Descriptor Configuration OptionsDefault 0xD0 Load Byte All Speed Field Name DescriptionConfigured 0xD2 Load Configured 0xD4 LoadByte 12 HubControllerPower Full-Speed Byte 8 MaximumPower Full-SpeedByte 9 MaximumPower High-Speed Byte 13 HubControllerPower High-speedByte 19 Write Protect Byte 20 NumLangs Byte 21 SupportedStringsBit Name Device Class Commands Supported USB RequestsHub Class Commands PortindicatorPorttest Vendor Commands Hub Class Feature Selector Recipient ValueUpstream USB Connection Downstream USB ConnectionsLED Connections System Block Diagram Sample SchematicElectrical Characteristics Ordering Code Package Type 17.0 Package Diagrams16.0 Ordering Information CY46XXJTC Issue Date Change Description of ChangeDocument History KKU
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