22.8.8 Battery Backup Power Switch (BBPS) Control
| Name: | BBPS |
| Offset: | 0x20 |
| Reset: | 0x00000000 |
| Property: | PAC 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 | |
| PSOKEN | WAKEEN | CONF[1:0] | |||||||
| Access | R/W | R/W | R/W | R/W | |||||
| Reset | 0 | 0 | 0 | 0 | |||||
Bit 3 – PSOKEN Power Supply OK Enable
| Value | Description |
|---|---|
| 0 |
The PSOK pin is not used. |
| 1 | The PSOK pin is used to determine the status of the Main Power Supply. |
Bit 2 – WAKEEN Wake Enable
| Value | Description |
|---|---|
| 0 | The device is not woken up when switched from battery backup power to Main Power. |
| 1 | The device is woken up when switched from battery backup power to Main Power. |
Bits 1:0 – CONF[1:0] Battery Backup Power Switch Configuration
| Value | Name | Description |
|---|---|---|
| 0x0 | NONE | The backup domain is always supplied by Main Power. |
| 0x1 | APWS | The power switch is handled by the Automatic Power Switch. |
| 0x2 | FORCED | The backup domain is always supplied by Battery Backup Power. |
| 0x3 | BOD33 | The power switch is handled by the BOD33. |