Adding DVFS Feature Support in i.MX RT1170
●The i.MX RT1170 is a new i.MX RT family of processors that provides high CPU performance and real-time response. The i.MX RT1170 integrates advanced power management module with DCDC and LDOs that reduce complexity of external power supply and simplify power sequencing.
●Dynamic voltage and frequency scaling (DVFS) is a power management technique that allows dynamically reducing power consumption of a CPU by dynamically scaling down supply voltage and CPU frequency. Because the internal DCDC of the i.MX RT1170 cannot cover the needed maximum current requirement at the junction temperature of 125 °C, the DVFS technique can be used to reduce current drain for compatibility with the internal DCDC. Lowering the processor frequency dynamically can help reduce the chip input current demand and ensure that the chip can continue to work at the junction temperature of 125 °C.
●Adding DVFS feature support requires configuring the following modules of the i.MX RT1170:
■Clock Control Module (CCM)
■DCDC Converter (DCDC)
■Temperature Sensor (TEMP SENSE)
■General Purpose Timer (GPT) — optional
●This document describes how to support DVFS feature in the i.MX RT1170 processor with internal DCDC for automotive applications. It also explains DVFS process workflow.
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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28 May 2021 |
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Rev. 0 |
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AN13267 |
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584 KB |
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