The system supports the following power ramp scenarios for MVIO when configured
in Dual-Supply mode:
- Supply ramp of VDDIO before
VDDIO2
- Supply ramp of VDDIO2 before
VDDIO
- VDDIO2 loses and regains
power
- VDDIO loses and regains
power
When either voltage domain loses power, the MVIO I/O pins are tri-stated. If
V
DDIO2 regains power, the pins will reload the current configuration of the PORT
registers. If V
DDIO loses power, the device will reset, and the PORTs will have to
be reinitialized. Refer to the
Electrical Characteristics section for V
DD
and V
DDIO2 power supply thresholds.
