TMS320F28379D: cmd文件的RAM配置

Part Number: TMS320F28379D

在例程cmd文件中查到这样的注释

/*
//###########################################################################
// FILE: flash_programming_cpu1_FLASH.cmd
// TITLE: Linker Command File For all F28X7x devices
//###########################################################################
// $TI Release: F2837xD Support Library v200 $
// $Release Date: Tue Jun 21 13:00:02 CDT 2016 $
// $Copyright: Copyright (C) 2013-2016 Texas Instruments Incorporated -
// http://www.ti.com/ ALL RIGHTS RESERVED $
//###########################################################################
*/

/* ======================================================
// For Code Composer Studio V2.2 and later
// ---------------------------------------
// In addition to this memory linker command file,
// add the header linker command file directly to the project.
// The header linker command file is required to link the
// peripheral structures to the proper locations within
// the memory map.
// The header linker files are found in <base>\F2837xD_headers\cmd
// For BIOS applications add: F28X7x_Headers_BIOS.cmd
// For nonBIOS applications add: F28X7x_Headers_nonBIOS.cmd
========================================================= */

/* Define the memory block start/length for the F28X7x
PAGE 0 will be used to organize program sections
PAGE 1 will be used to organize data sections

Notes:
Memory blocks on F28M3Xx are uniform (ie same
physical memory) in both PAGE 0 and PAGE 1.
That is the same memory region should not be
defined for both PAGE 0 and PAGE 1.
Doing so will result in corruption of program
and/or data.

Contiguous SARAM memory blocks or flash sectors can be
be combined if required to create a larger memory block.
*/

在spru513aa文件的8.5.5.2.7 Using the Page Method内看到了另外一种做法,是支持ram段的重叠复用。请问这两种方法的使用界限是什么