Memory Overview

The CC35xx device supports on-chip and off-chip memories. The memories are used for execution, data and non volatile memory. The on-chip memory includes SRAM and the off-chip memories supported are serial Flash and serial PSRAM. The SRAM is used for execution and data. It is divided into Tightly Coupled Memory (TCM) and non TCM. The Flash is non volatile memory used for execution and for data storage. The PSRAM is used as data storage. Each of the memories can be accessed by the M33 MCU, Host DMA and the μDMA. The host DMA is used for data transfer between peripherals and the device on-chip SRAM. The μDMA is used for data transfer between the external Flash/PSRAM and on-chip SRAM.

Configuring External Memory

The following section will explain how to choose the appropriate memory options when building applications.

In the Memory Map module of the CC35xx syscfg file there will be a drop down menu of all the current supported Flashes (list found in Hardware Overview) as well as a drop down menu to choose what PSRAM is connected to the device, if any.

Choosing the appropriate flash is important. Sysconfig will automatically map the addresses of image containers, fw container, bootloaders, and Non Volatile storage in accordance to flash type. These addresses can be found in the generated file ti_flash_map_config.c