21.3.2 SFRBU DDR BU Mode Control Register

Name: SFRBU_DDRBUMCR
Offset: 0x10
Reset: 0x00000000
Property: Read/Write

Bit 3130292827262524 
          
Access  
Reset  
Bit 2322212019181716 
          
Access  
Reset  
Bit 15141312111098 
          
Access  
Reset  
Bit 76543210 
        BUMEN 
Access R/W 
Reset 0 

Bit 0 – BUMEN DDR BU Mode Enable

Isolates the DDR pads from the CPU domain (VDDCORE).

Must be set after enabling the Self-refresh mode on the DDR memory and before powering down on VDDCORE.

To enable Self-refresh mode, refer to the MPDDRC Low-power register (MPDDRC_LPR) in the section "Multi-port DDR-SDRAM Controller" and to "Backup Mode with DDR in Self-refresh" in the section "Electrical Characteristics".

ValueDescription
0 Reset value. DDR Backup mode disabled. The DDR pads are not isolated from CPU domain.
1

DDR Backup mode enabled. The DDR pads are isolated from CPU domain (IOs are in memory state).