Initialize the MVIO in Dual-Supply configuration by following these steps:
- 1.Program the Multi-Voltage System
Configuration (MVSYSCFG) fuse to the Dual-Supply configuration.
- 2.Optional: Write the VDDIO2 Interrupt
Enable (VDDIO2IE) bit to ‘
1
’ in the Interrupt Control (MVIO.INTCTRL)
register.
- 3.Read the VDDIO2 Status (VDDIO2S) bit in
the Status (MVIO.STATUS) register to check if the VDDIO2 voltage is within the
acceptable range for operation.
- 4.Configure and use the PORT pins powered
by VDDIO2.
If the MVSYSCFG fuse is programmed to the Single-Supply configuration, the VDDIO2 Status
bit is read as ‘
1
’, and the VDDIO2 Interrupt Flag is read as
‘
0
’.