Power Domain Partitioning

SAM L21 peripherals are partitioned into five different power domains. The partitioning can be seen in Table 1 and Figure 1.

Table 1. Power Domain Partitioning
PDBACKUP PDTOP PD0 PD1 PD2
OSC32CTRL EIC AC AES CORE
PM PORT ADC AHB-APB Bridges DSU
RSTC WDT CCL DAC SRAM
RTC   EVSYS DMAC USB
SUPC   GCLK I2S Flash
    MCLK PAC  
    OPAMP SERCOM  
    OSCCTRL TC  
    PTC TCC  
    LP TC TRNG  
    LP SERCOM LP SRAM  
Figure 1. Power Domain Partitioning