This section describes the power requirements, power-on sequence, power-on reset sequence, and power management functions.
| Parameter | Description |
|---|---|
| DC input power | +12V, 3A |
| Recommended power adapter | The CUI Inc. SMI36-12-V-P6 adapter connected using a center-pin positive barrel connector (2.5 mm ID, 5.5 mm OD) |
| SOM supply | +5V, 3A (VCC_SOM) |
| SOM power telemetry | Current sense device is available through the I2C bus to monitor the current on the VCC_SOM power rail |
| USB 3.0 | 5.0V, 900 mA per port (1.0A limit per port) |
| Pmod interface from Digilent Inc. | 3.3V, 100 mA (1.0A limit, shared across all four Pmod expansion interfaces) |
| Raspberry Pi Expansion Header | 3.3V (1.0A limit), 5.0V (1.0A limit) |
| SFP+ | 3.3V (600 mA) |
| Framos FPA SLVS-EC | 1.8V (800 mA), 3.8V (1.0A) |
| microSD card | 3.3V (200 mA) |
KR260 Starter Kit Power On Sequence
- External power adapter supplies 12V power
- Carrier card on-board regulator generates 5V supply and provides power to other voltage regulators
- SOM power rail (VCC_SOM) is powered by a 5V supply
- When the 5V regulator output voltage level is within the specified range and
a power-good signal is asserted and the
POWER_OFF_C2M_L(PWROFF_C2M_Bin schematic) signal is deasserted by the carrier card - SOM on board power on sequencing starts
- Carrier card provides PS and PL VCCO voltage
rails after the SOM asserts the
VCCOEN_PS_M2CandVCCOEN_PL_M2Csignals
KR260 Starter Kit Power On Reset
- The SOM reset signal
PS_POR_L(PS_POR_Bin schematic) is held in reset until thePS_PGOOD(CC_PS_PGOODin schematic) signal is asserted. - To perform a hard reset on the SOM, use the reset push-button on the carrier
card to assert the
PS_POR_L(PS_POR_Bin schematic) signal. - All the PS and PL I/O device reset signals on the carrier card are held in reset until 25 ms after the PS and PL power domain are powered up and stable.