20.2.1 Parameters Used for Obtaining Power-Up to Functional Time Data

This section describes the parameters used for obtaining power-up to functional time data. Following are the test conditions:

• Power on reset delay setting: 1 ms
• Supply ramp rate: 5 µs
• Measurement temperature: 25° C

The Power-On Reset delay setting indicates how long VDD takes to ramp up. The programmable delay counter starts counting based on the Power-on Reset delay setting, oscillator frequency, and period variability to ensure that the supplies have reached their minimum operating levels.

The supply ramp rate indicates the ramp up rate of on-board VDD core voltage, VPP charge pump voltage, and VDDA Phase-Locked Loop (PLL) analog voltage supplies.