pub type RRS_W<'a, const O: u8> = BitWriter<'a, u32, CR3_SPEC, RRS_A, O>;
Field RRS writer - SRAM2 retention in Standby mode
RRS
SRAM2 powered off in Standby mode (SRAM2 content lost)
SRAM2 powered by the low-power regulator in Standby mode (SRAM2 content kept)