Memory Map

The CC13x2 or CC26x2 contains several memory regions including RAM, ROM, and Flash. This section aims to show how these memory regions are utilized by the stack and user application.

The stack library configuration memory map can be seen below. See Stack Library Configuration for more information on the configuration.

Memory Section	Starting Address	Size (bytes)	Description
Flash	0x00000000	60	Cortex Interrupt Vecs
	0x00001000	816	TI RTOS ROM Jump Table (see note)
	Application / Stack Code
	SNV	1-2 pages	Simple Non-Volatile Storage
	Last Flash Page*	88	Customer Configuration
ROM	0x10000000	ROM_SIZE	TI-RTOS, BLE-Stack/BLE5-stack, Crypto, Driverlib, Boot
RAM	0x20000000	RAMVEC_SIZE	Interrupt Vector Table in RAM for dynamic Hwi creation
	0x20000100	RTOSRAM_SIZE	Reserved for pointers for TI-RTOS in ROM
	.bss and .data
	ICall heap
	TI-RTOS kernel system stack (CSTACK)
AUX RAM	0x400E0000	AUXRAM_SIZE	Memory area belonging to the Sensor Controller

Note

At the table above, the following variables are platform dependent.

• Last Flash Page: top of the Flash subtracted by its page size

  • CC13x2 or CC26x2 : 344 kB or 0x56000 (0x58000 - 0x2000)
  • CC13x2x7 or CC26x2x7 : 696 kB or 0xAE000 (0xB0000 - 0x2000)

• ROM_SIZE : 256 kB

• RAMVEC_SIZE : 216 B

• RTOSRAM_SIZE : 24 B

• AUXRAM_SIZE : 4 kB

The TI-RTOS ROM Jump Table can be relocated to any address. To do that, open the .cfg file of your project and add the following lines after the ROM declaration:

var ROM = xdc.useModule('ti.sysbios.rom.ROM');
if (Program.cpu.deviceName.match(/CC26/)) {
ROM.romName = ROM.CC26X2V2;
}
else if (Program.cpu.deviceName.match(/CC13/)) {
ROM.romName = ROM.CC13X2V2;
}
ROM.constStructAddr       = 0x4000;  // replace 0x4000 with any address in FLASH
ROM.externFuncStructAddr  = 0x43C0;  // replace 0x43C0 with any address in FLASH
ROM.dataStructAddr        = 0x20001080;  // replace 0x20001080 with any address in RAM

For projects that use OAD, the TI-RTOS Jump Table definitions are later in the .cfg file. Check for the declaration below:

if (Program.build.cfgArgs.OAD_IMG_A == 1)
{
  m3Hwi.resetVectorAddress  = 0x00055fc0;
  ROM.constStructAddr = 0x37000;
  ROM.externFuncStructAddr = 0x373C0;
}
else if (Program.build.cfgArgs.OAD_IMG_B == 1) //(OAD_IMG_TYPE == "B")
{
  if (compilerDefs.indexOf('SECURITY') > -1)
  {
     // Check for SECURITY compiler symbol
      m3Hwi.resetVectorAddress = 0x90; // Image B Reset Vector Address
  }
  else
  {
     m3Hwi.resetVectorAddress = 0x50; // Image B Reset Vector Address
  }
  ROM.constStructAddr = 0x01000;
  ROM.externFuncStructAddr = 0x013c0;
}
else
{
   m3Hwi.resetVectorAddress = 0x0;
}

The .map file for a given project can be consulted to see exactly what sections of the stack reside in ROM.

Note

The SNV region can be configured to be either one or two pages long using the NVOCMP_NVPAGES define. On some systems, only two page SNV may be supported. Refer to Flash for more information about what is supported on a given platform.