15.6.8 MVIO Control
| Name: | MVIO |
| Offset: | 0x24 |
| Reset: | 0x00000000 |
| Property: | Local Write-Protection |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| Access | |||||||||
| Reset |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| Access | |||||||||
| Reset |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| Access | |||||||||
| Reset |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| VDDIO2CFG[1:0] | MODE | ||||||||
| Access | R/W | R/W | R | ||||||
| Reset | 0 | 0 | 0 | ||||||
Bits 3:2 – VDDIO2CFG[1:0] VDDIO2 Configuration
This bit field is used to configure VDDIO2 when operating in Dual Mode. When operating in Single Mode, writes to this bit field will be ignored. Switching between LOWPOWER and VDDIO2OFF modes must go via NORMAL mode.
If the MVIO system is in NORMAL mode with STATUS.VDDIO2OK=0, writes to this bit field will be ignored.
| Value | Name | Description |
|---|---|---|
| 0x0 | NORMAL | VDDIO2 with voltage protection enabled |
| 0x1 | LOWPOWER | VDDIO2 with voltage protection disabled |
| 0x2 | VDDIO2OFF | VDDIO2 domain is disabled. I/O pins are not available. |
| Other | — | Reserved |
Bit 0 – MODE Operation Mode
This bit indicates the MVIO operation mode. The configuration is loaded from the BOOTCFG - Boot Configuration Fuse (USERCFG.MVIOMODE) and cannot be changed by the user. The content of the MODE is reset on POR and BOR, and is re-loaded from fuse during the system initialization after all resets.
| Value | Name | Description |
|---|---|---|
| 0 | DUAL | MVIO operating in dual supply mode |
| 1 | SINGLE | MVIO operating in single supply mode |