From JH7110 datasheet:
page 79:
| VDD09_CPU | VDD_CPU | 2 | 0.9 to 1.0 | CPU core power supply, which can be adjusted to 1.0 V |
page 86:
| VDD | Power supply for Core | 0.81 | 0.99 | V |
That’s min (0.81) and max (0.99).
Same page:
| VDD | VSS | Core power supply | 0.81 | 0.9 | 0.99 | V |
That’s min(0.81), typical (0.9) and max (0.99).
Someone from StarFive should know better but I wouldn’t put over 1V on it.
Also, this is for Core voltage, not I/O.
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