CC78K0S Datasheet, PDF (356/520 Pages) NEC – C Compiler Ver.1.30 or Later Language

CHAPTER 11 EXTENDED FUNCTIONS
(13) Absolute address access function
Absolute Address Access Function
#pragma access
FUNCTION
• A code to access the ordinary RAM space is output to the object through direct inline expansion, not by
function call, and an object file can be created.
• If the #pragma directive is not described, a function accessing an absolute address is regarded as an
ordinary function.
EFFECT
• A specific address in the ordinary memory space can be easily accessed through C description.
USAGE
• Describe the #pragma access directive at the beginning of the C source.
• Describe the directive in the source in the same format as a function call.
• The following items can be described before #pragma access.
• Comment statements
• Other #pragma directives
• Preprocessing directives that neither define nor reference variables or functions
• The keywords following #pragma can be described in either uppercase or lowercase letters.
The following four function names are available for absolute address accessing.
peekb, peekw, pokeb, pokew
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