The memory map editor provides a tree structured view of the memory space of a target. The memory map consists of a set of different node types that are arranged in a hierarchy. These nodes have properties that can be modified using the properties window when the node is selected. These properties and the placement of nodes within the memory map are used as input to the program building process so that the linker knows where sections should be placed. Additionally the debugger uses the information in memory map files to enable register display and memory display.

The memory map editor supports the following node types:

- Root The top most node of the memory map.
- Memory Segment A range of addresses that represents a memory region in the target.
- Program Section Represents a program section of your application.
- Register Group Represents an area of memory that contains a group of related registers.
- Register Represents a memory mapped register.
- Bit Field Part of a memory mapped register.

The following statements hold regarding the creation and movement of nodes within a memory

- Memory segments can be within the Root segment.
- Program sections must be within a memory segment.
- Register groups can be within the Root or within a memory segment.
- Registers can be within memory segments or register groups.
- Bit Fields can be within registers.

All nodes have mandatory and optional properties associated with them. All nodes have a mandatory Name property. This name should be unique within the memory map.

### Memory Segment/Register Group Properties

- Start Address A hexadecimal number stating where the memory begins (lowest address).
- Start Address Symbol The name of a linker symbol to generate that has the value of the Start Address.
- Size A hexadecimal number that defines the size in bytes of the memory segment.
- Size Symbol The name of a linker symbol to generate that has the value of the Size.
- Access Type Specifies if the memory segment is read only or read/write.

### Program Section Properties

- Start Address An optional hexadecimal value that is the absolute load position of the section. If this isn't set then the relative placement of the program section within the memory segment will determine the load position of the section.
- Size An optional decimal value that is the size in bytes of the program section.
- Load Specifies whether or not the section should be loaded by the debugger.
- Alignment An optional decimal value that specifies the alignment requirements of the section.
- Section To Run In An optional name of another program section that this program section will be copied to.
- Input Section Names The optional names of the files that will be placed into this section.

### Register Properties

- Start Address A hexadecimal value specifying where the register is placed.
- Start Address Symbol The name of a linker symbol to generate that has the value of the Start Address.
- Register Type Optional, a C type specifying how you want the register to be displayed. The defaults to the word length of the target processor.
- Endian Optional, specifies the byte order of a multibyte register. This defaults to the byte order of the target processor.

### Bitfield Properties

- Bit Offset A decimal value that is the starting bit position of the bit field. Bit 0 is the first bit position.
- Bit Length A decimal value that defines the number of bits in the field.

The editor has many of the attributes of the text editor and the same key-bindings for example cut, copy and paste are all accessible from the Edit menu. In addition to the standard editor capabilities the memory map editor supports the movement up and down of nodes within a hierarchy. This enables the sequencing of program sections to be achieved.