Datasheet
Each port’s indicator must be located in a position that obviously associates the indicator with the port. The color and state of the LED is used to provide status information to the user.
Two different modes of operation are supported for the port indicators: automatic mode and manual mode. The USB20H04 defaults to automatic mode upon
Table 7.1 - Automatic Mode Port Indicators
COLOR | DEFINITION |
Off | Disconnected, Disabled, Not |
| Configured, Resetting, Testing, |
| Suspending, or Resuming |
Amber | Over Current Condition |
Green | Enabled, Transmit, or TransmitR |
In manual mode, the host controls the color and state of the indicator LED by sending a command to the USB20H04 to put the LED in a particular state. This is described in Table 7.2 - Manual Mode Port Indicators.
Table 7.2 - Manual Mode Port Indicators
COLOR | DEFINITION |
Off | Not Operational |
Amber | Error Condition |
Green | Fully Operational |
Blinking | Software Attention |
Off/Green |
|
Blinking | Hardware Attention |
Off/Amber |
|
The USB20H04 can be configured to either support or not support port indicators. If port indicators are not included in the hub design, disable this feature in the configuration.
SMSC USB20H04 | Page 19 | Revision 1.63 |
DATASHEET