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AM69AX 数据表(PDF) 155 Page - Texas Instruments |
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AM69AX 数据表(HTML) 155 Page - Texas Instruments |
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155 / 299 page  7.10.2.4 Isolated MCU and Main Domains Power- Up Sequencing Isolated MCU and Main voltage domains enable an SoC’s MCU and Main processor sub-systems to operate independently. There are 2 reasons an SoC’s PDN design may need to support independent MCU and Main processor functionality. First is to provide flexibility to enable SoC low power modes that can significant reduce SoC power dissipation when processor operations are not needed. Second is to enable robustness to gain freedom from interference (FFI) of a single fault impacting both MCU and Main processor sub-systems which is especially beneficial if using the SoC’s MCU as the system safety monitoring processor. The number of additional PDN power rails needed is dependent upon number of different MCU IO signaling voltage levels. If only 1.8V IO signaling is used, then only 2 additional power rails could be required. If both 1.8 and 3.3V IO signaling is desired, then 4 additional power rails could be needed. www.ti.com AM69A SPRSP92 – FEBRUARY 2023 Copyright © 2023 Texas Instruments Incorporated Submit Document Feedback 155 Product Folder Links: AM69A |
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