The board may be powered either by the standard 20 way ATX type Molex connector or the 20 way SIL 0.1inch auxiliary power connector.
Table 2.2. ATX power connector pinouts PL23
| Pin | Name | Description |
|---|---|---|
| 1 | 3.3V | 3.3 Volt supply |
| 2 | 3.3V | 3.3 Volt supply |
| 3 | GND | Power ground |
| 4 | 5V | 5 Volt supply |
| 5 | GND | Power ground |
| 6 | 5V | 5 Volt supply |
| 7 | GND | Power ground |
| 8 | DC_OK | DC supply is ready |
| 9 | 5V_SBY | 5V Standby |
| 10 | 12V | 12 Volt supply |
| 11 | 3.3V | 3.3 Volt supply |
| 12 | -12V | 12 Volt negative supply |
| 13 | GND | Power ground |
| 14 | PSU_EN | Power supply enable |
| 15 | GND | Power ground |
| 16 | GND | Power ground |
| 17 | GND | Power ground |
| 18 | -5V | Negative 5 Volt supply |
| 19 | 5V | 5 Volt supply |
| 20 | 5V | 5 Volt supply |
Table 2.3. SIL power connector pinouts PL24
| Pin | Name | Description |
|---|---|---|
| 1 | 3.3V | 3.3 Volt supply |
| 2 | 3.3V | 3.3 Volt supply |
| 3 | GND | Power ground |
| 4 | GND | Power ground |
| 5 | 5V | 5 Volt supply |
| 6 | 5V | 5 Volt supply |
| 7 | 5V_SBY | 5 Volt standby |
| 8 | ALIVE | Supply alive |
| 9 | 12V | 12 Volt supply |
| 10 | GND | Power Ground |
| 11 | GND | Power Ground |
| 12 | -12V | 12 Volt negative supply |
| 13 | -5V | 5 Volt negative supply |
| 14 | GND | Power supply ground |
| 15 | PWM | Enable PWM supply |
| 16 | 5V_EN | 5 volt supply enable |
| 17 | 3V_EN | 3 volt supply enable |
| 18 | PSU_ON | Supply on switch |
| 19 | PG | Power Good |
| 20 | IO/VIN | ADC Vin for supply monitoring |
Some typical power usages are presented here in Table 2.4, “Typical power usage”. A fully specified platinum board with CPU clocked at 202MHz, memory bus at 101MHz , 256MB of SDRAM and all options fitted was used to profile the worst case power usage with no USB peripherals fitted. All figures are subject to a 1% measurement accuracy and are for guidance purposes only.
Table 2.4. Typical power usage
| Tested Configuration | Current From 3.3V | Current From 5V | Total power usage |
|---|---|---|---|
| serial + both network ports + video | 500mA | 167mA | 2.49W |
| serial + one network port + video | 435mA | 167mA | 2.27W |
| serial + both network ports | 425mA | 56mA | 1.68W |
| serial + one network port | 360mA | 56mA | 1.47W |
| serial only | 275mA | 56mA | 1.19W |