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Description of LED’s and Connectors |
/documentation/consumer/dragonboard/dragonboard410c/guides/led-connectors.md.html |
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Throughout this document, references are made to certain board connectors, headers and switches. There are also six activity LEDs on the board. These items are described further in this section
+----------------------+----------------------+--------------------------+
| Board Identifier | Description | Behavior |
+----------------------+----------------------+--------------------------+
| J8 | Low Speed Connector | This connector contains |
| | | low speed peripheral |
| | | signals just as UART and |
| | | GPIO. In context of |
| | | this document, we use it |
| | | for connecting the UART. |
+----------------------+----------------------+--------------------------+
| S6 | 4 channel Dip Switch | Located on the back of |
| | | the board, this Switch |
| | | provides some manual |
| | | configuration settings. |
| | | In context of this |
| | | document, it is used to |
| | | select boot order (SD |
| | | Card first or eMMC |
| | | first) OTG modes. |
| | | |
+----------------------+----------------------+--------------------------+
Located by the USB ports are a series of LEDs used to provide information to the user. Their usage is defined as follows:
When Debian-based images are installed, the following table defines the LED usage/behaviors.
+----------------------+----------------------+--------------------------+
| LED Board Identifier | Description | Behavior |
+----------------------+----------------------+--------------------------+
| User LED 1 | Heartbeat | Green: This LED is |
| | | should always be |
| | | blinking about once a |
| | | second. If solid off or |
| | | solid on, the board is |
| | | not executing correctly |
+----------------------+----------------------+--------------------------+
| User LED 2 | eMMC | Green: This LED blinks |
| | | during accesses to eMMC |
+----------------------+----------------------+--------------------------+
| User LED 3 | SD | Green: This LED blinks |
| | | during accesses to SD |
| | | Card |
+----------------------+----------------------+--------------------------+
| User LED 4 | currently unassigned | N/A |
+----------------------+----------------------+--------------------------+
| Wifi | Wifi | Yellow: This LED blinks |
| | | during network accesses |
| | | over Wifi |
+----------------------+----------------------+--------------------------+
| BT | Bluetooth | Yellow: This LED blinks |
| | | when Bluetooth is being |
| | | used |
+----------------------+----------------------+--------------------------+
When Android-based images are installed, the following table defines the LED usage/behaviors.
+----------------------+----------------------+--------------------------+
| LED Board Identifier | Description | Behavior |
+----------------------+----------------------+--------------------------+
| User LED 1 | currently unassigned | Green: |
+----------------------+----------------------+--------------------------+
| User LED 2 | currently unassigned | Green: |
| | | |
+----------------------+----------------------+--------------------------+
| User LED 3 | currently unassigned | Green: |
| | | |
| | | |
+----------------------+----------------------+--------------------------+
| User LED 4 | Boot | This LED illuminates at |
| | | at the start of boot |
| | | and turns of after |
| | | completion of boot. |
+----------------------+----------------------+--------------------------+
| Wifi | Wifi | Yellow: TDB |
+----------------------+----------------------+--------------------------+
| BT | Bluetooth | Yellow: TBD |
+----------------------+----------------------+--------------------------+