Measuring temperature and current of SP7021 for many cases
1. Firmware setting:
File path: linux/kernel/arch/arm/boot/dts/sp7021-ev.dts
Added status = ”disabled”; to node of devices.
2. Results of Measuring Temperature
| 1.2V current (mA) | Power (mW) | Temperature (°C) |
Enable Display | 901 | 1081.2 | 54.6 |
Disable Display | 775 | 930 | 51.5 |
Reduce | 126 | 151.2 | 3.1 |
| 1.2V current (mA) | Power (mW) | Temperature (°C) |
Enable HDMI | 901 | 1081.2 | 54.6 |
Disable HDMI | 819 | 982.8 | 53.1 |
Reduce | 82 | 98.4 | 1.5 |
| 1.2V current (mA) | Power (mW) | Temperature (°C) |
|---|---|---|---|
Enable MIPI | 901 | 1081.2 | 54.6 |
Disable MIPI | 863 | 1035.6 | 53.9 |
Reduce | 35 | 45.6 | 0.7 |
3. Modify CPIO clock and measure 1.2V/3.3V current
CPIO Clock | 1.2V current (mA) | 3.3V current (mA) |
|---|---|---|
400M | 915 | 109 |
200M | 905 | 103 |
Reduce | 10 | 6 |
4. Modify SYSCLK and measure 1.2V/3.3V current
SYSCLK | 1.2V current (mA) | 3.3V current (mA) |
|---|---|---|
202M | 915 | 109 |
101M | 723 | 95 |
Reduce | 192 | 14 |