: Sourced or verified via the USB / Lightning port interface. RVP : Reverse Voltage Protection (or Reverse Voltage Phase).
pp‑var‑usb‑rvp defines a repeatable method to: pp-var-usb-rvp
On the reference board, the USB interface connects to an embedded controller (EC) or a sideband management controller. This controller has I2C or SMBus connections to the PMICs and VRMs. When the host sends a "PP-VAR" command (e.g., "Increase V_core by 50mV"), the USB interface translates this into an I2C write command to the voltage regulator. : Sourced or verified via the USB / Lightning port interface
| Segment | Expansion | Interpretation | |---------|-------------------------|-----------------------------------------------------| | pp | Platform Profile | Target device class or host controller profile | | var | Variable | Focus on variable fields in USB descriptors/transfers | | usb | Universal Serial Bus | Protocol layer under test | | rvp | Runtime Verification Point | Check at execution, not static analysis | This controller has I2C or SMBus connections to
: A USB multi-meter reveals the device detects a voltage pressure of 5V but refuses to draw current.
