13.8.8.1 Control A

Name: CTRLA
Offset: 0x00
Reset: 0x00
Property: PAC Write-Protection

Bit 76543210 
      IORET   
Access R/W 
Reset 0 

Bit 2 – IORET I/O Retention

Note: This bit is not reset by a backup reset.
ValueDescription
0 After waking up from Backup mode, I/O lines are not held.
1 After waking up from Backup mode, I/O lines are held until IORET is written to 0.