10.3.2 SAMA5D2 LPDDR2 SiP
The DDRM_VDD12 power rail must be connected to VDDIODDR (1.2V). The DDRM_VDD18 power rail must be connected to a 1.8V power supply. For Backup with Self-refresh mode, these power supplies must be maintained.
Important: The sections below
supersede the “Recommended Power-up Sequence”, “Recommended Power-up Sequence” and
“Power Supply Sequencing at Backup Mode Entry and Exit” sections in the SAMA5D2 Series
data sheet (see Reference Documents).