Tight Coupled Memory on Microchip Cortex®-M7 MCU
This document describes how to configure and use the tight coupled memory (TCM) features in PIC32C and SAM MCUs using the MPLAB® XC32 compiler and MPLAB Harmony v3 software development framework within the MPLAB X IDE.
TCM offers numerous advantages for application developers, providing performance equivalent to when the code is located in cache.
Below are some suggestions for optimizing TCM usage in applications:
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The application stack can be located in DTCM
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The application heap can be located in DTCM
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Critical variables can be located in DTCM
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Frequently updated variables can be located in DTCM
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Critical functions/programs can be located in ITCM
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A copy of the interrupt vector table can be located in ITCM
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Interrupt service routines can be located in ITCM
Main Content
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Overview of Microchip Cortex-M7 based MCUs
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Overview of Cache Memory and TCM
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Tight Coupled Memory
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Configuration
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Impact of Software on TCM
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Programming Sequence for TCM Configuration
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Hardware and Software Requirements
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Compiling and Programming the Application
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Observing Output on MPLAB Data Visualizer
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