Status LEDs / LED Control Lines
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BASIC/C-programmable devices supplied by Tibbo have one or two pairs of LEDs (or lines to control them).
Devices with 2 pairs of LEDs
On such devices, the first LED pair is comprised of green (SG) and red (SR) status LEDs, the second pair — of green (EG) and yellow (EY) Ethernet LEDs.
Status LEDs have multiple functions:
•When the device is in the firmware upgrade mode, these LEDs indicate the status of the firmware upload process.
•When the device is under TiOS firmware control and Tibbo BASIC/C application is not running, these LEDs show current Tibbo BASIC/C application status.
•When the Tibbo BASIC/C application is running, status LEDs are under the control of the pat. object.
The following table summarizes predefined status LED patterns:
Ethernet LEDs indicate the following:
•Link/Data LED (green) is turned on when live Ethernet cable is plugged into the device. The LED blinks whenever an Ethernet packet is received.
•100BaseT LED (yellow) is turned on when the device links with the hub at 100Mb. The LED is off when the link is established at 10Mb.
Devices with a single LED pair
On such devices, there are green (SG) and red (SR) status LEDs (or lines to control them). They function just as described above, but with one caveat: the brightness of these LEDs is indicative of the current Ethernet link state. When live Ethernet cable is not plugged into the device, the LEDs "play" patterns at a reduced brightness. When live Ethernet cable is plugged into the device, the LEDs "play" patterns at full brightness.
On devices with a single LED pair, there is no indication for the 100BaseT/10BaseT connection mode.
Some such devices feature a single third LED (or line to control it). This LED indicates current Ethernet link status: it will be on when live Ethernet cable is plugged.