The voltage adjustment policy based on temperature is provided to PLM/XilPM with the following CDO command entry:
#Lower Threshold: 10°C (0x500); Upper Threshold: 25°C (0xc80)pm_add_node 0x4328030 0x3 0x500 0x3 0xc80 0x2Note: Do not modify the above values because they follow the
supported upper and lower trip points.
| Node Id | 0x4328030 | PM_POWER_VCCINT_PL | Node Id of VCCINT Power Rail |
|---|---|---|---|
| Type: 0x1 (I2C/PMBus); 0x2 (Pgood); 0x3 (Temperature Voltage Adjust) | 0x3 | Temperature Voltage Adjust | Instructs XilPM how to handle the power rail. |
| Lower Temperature Threshold | 0x500 | 10°C * 128 = 0x500 (Do not modify) | |
| Upper Voltage Mode Id | 0x3 | Indicates which power mode of VCCINT the power rail transitions when the ‘Lower Temperature Threshold’ of 10°C is met. Different power modes for VCCINT are defined by “# Four power modes for VCCINT rail: 0 - OFF, 1 - ON, 2 - LOWER (0.70V), 3 - UPPER (0.725V)” CDO line. Because the power mode is 0x3, it indicates that when the temperature reaches 10°C, the power rail is transitioned to UPPER voltage of 0.725V. | |
| Upper Temperature Threshold | 0xc80 | 25°C * 128 = 0xc80 (Do not modify) | |
| Lower Voltage Mode Id | 0x2 | Indicates which power mode of VCCINT the power rail transitions when the ‘Upper Temperature Threshold’ of 30°C is met. The VCCINT power rail is transitioned to power mode 2 (2–LOWER (0.70V)). |