 C166 User's Guide | |
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C166 User's Guide
C166 Introduction Compiling Programs Language Extensions
Keywords Memory Models Tiny Model Small Model Medium Model Compact Model Large Model HCompact Model HLarge Model XLarge Model Memory Types near far bdata ebdata idata sdata huge xhuge Memory Type Comparison Pointers with Memory Types Implicit Memory Types Type Qualifiers const volatile Data Types Special Function Registers sfr Types sbit Types bit Types Bit-Addressable Objects Function Declarations Return Values Register Bank Register Mask Interrupt Functions Fast Interrupts Cached Vectors Fast Register Banks Inline Functions Real-Time Function Tasks Inline Assembly Traditional Inline Assembly Extended Inline Assembly Register Use Use in Macro Definitions Preprocessor Advanced Programming Error Messages Library Reference AppendixSmall Model
The small memory model (selected with the SMALL directive) uses the segmented mode of the C16x/ST10/XC16x microcontroller. This is the default memory model if no model is specified. In this memory model:
- Variables are stored in near memory.
- Functions are stored in near memory and are accessed using near calls.
This memory model provides the same efficient code as the Tiny Memory Model but code and data are not limited to 64K. You may locate variables and use functions with far, huge, and xhuge memory types which permit full use of the C16x/ST10 address capabilities.
This memory model is the best choice for programs that have small code and small data requirements but require access to more than 64K of address space.
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