BORA SOM/BORA Evaluation Kit/Interfaces and Connectors/Power Supply
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Contents
Power Supply[edit | edit source]
Power supply - J7[edit | edit source]
Power is provided through the J7 connector.
| Pin# | Pin name | Function | Notes |
|---|---|---|---|
| 1 | VIN | Power supply | Nominal: +12V |
| 2 | DGND | Ground | - |
POWER GOOD signals selector - J10[edit | edit source]
J10 is a 8-pin 4x2x2.54 pitch vertical header used for the selection - through jumpers - of the POWER GOOD options. The following table reports the pinout of the connector:
| Pin# | Pin name | Function | Notes |
|---|---|---|---|
| 1 | BOARD_PGOOD | - | - |
| 2, 4 | 3.3V_SOM | - | - |
| 3 | 1.5V_POWER_GOOD | - | - |
| 5 | VREF_POWER_GOOD | - | - |
| 6, 8 | 3.3V_SBY | - | - |
| 7 | 1.8V_POWER_GOOD | - | - |
The available configurations are:
- No jumpers mounted (DEFAULT)
- Jumper on 1-2 -> supply BOARD_PGOOD with 3.3V_SOM
- Jumper on 3-4 -> supply 1.5V_POWER_GOOD with 3.3V_SOM
- Jumper on 5-6 -> supply 1.5V_VREF_POWER_GOOD with 3.3V_SBY
- Jumper on 7-8 -> supply 1.8V_VREF_POWER_GOOD with 3.3V_SBY
BANK35, BANK13 VDDIO selector - J11[edit | edit source]
J11 is a 8-pin 4x2x2.54 pitch vertical header used for the selection - through jumpers - of the bank supply voltages. The following table reports the pinout of the connector:
| Pin# | Pin name | Function | Notes |
|---|---|---|---|
| 1, 5 | 3.3V | - | - |
| 2, 4 | VDDIO_BANK35 | - | - |
| 3 | EVB_VDDQ_1V5 | - | - |
| 6, 8 | VDDIO_BANK13 | - | - |
| 7 | EVB_VDDIO_BANK13 | - | - |
The available configurations are:
- Jumper on 1-2 -> supply VDDIO_BANK35 with 3.3V (requirerd when EVBB DDR3 device is used)
- Jumper on 3-4 -> (Not Available) supply VDDIO_BANK35 with EVB_VDDQ_1V5 (requirerd when EVBB DDR3 device is used)
- Jumper on 5-6 -> supply VDDIO_BANK13 with 3.3V
- Jumper on 7-8 -> supply VDDIO_BANK35 with EVB_VDDIO_BANK13 (requirerd when TRACE is used)
The following rules must be observed:
- Because of a hardware limitation, VDDIO_BANK35 must be configured for 3.3V power supply (Jumper on 1-2).
- The configuration 1. (Jumper on 1-2) excludes 2. (Jumper on 3-4) (and viceversa)
- The configuration 3. (Jumper on 5-6) excludes 4. (Jumper on 7-8) (and viceversa)
The DEFAULT configuration is:
- Jumper on 1-2 (please note that this jumper must not be removed)
- Jumper on 5-6
