SPRSP57E april 2020 – june 2023 DRA821U , DRA821U-Q1
PRODUCTION DATA
Refer to the PDF data sheet for device specific package drawings
Figure 7-9 describes the primary power-up sequencing when similar MCU and Main voltage domains are combined into common power rails. Combining MCU and Main voltage domains makes an SoC’s MCU and Main processor sub-systems operational dependent on common power rails. The main reason an SoC’s PDN design may want to group MCU and Main voltage domains is simplify the PDN by reducing total number of power rails and sources. This simplified PDN would be used in systems that do not desire independent MCU and Main processor sub-system operations.