23.8.8 Battery Backup Power Switch (BBPS) Control

Name: BBPS
Offset: 0x20
Reset: 0x0000
Property: PAC Write-Protection

Bit 3130292827262524 
          
Access  
Reset  
Bit 2322212019181716 
          
Access  
Reset  
Bit 15141312111098 
          
Access  
Reset  
Bit 76543210 
     PSOKENWAKEENCONF[1:0] 
Access R/WR/WR/WR/W 
Reset 0000 

Bit 3 – PSOKEN Power Supply OK Enable

ValueDescription
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

ValueDescription
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

ValueNameDescription
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.