PIC18F6390 Datasheet, PDF (346/412 Pages) Microchip Technology – 64/80-Pin Flash Microcontrollers with LCD Driver and nanoWatt Technology

PIC18F6390/6490/8390/8490
24.2.5 SPECIAL CONSIDERATIONS WITH
MICROCHIP MPLAB^® IDE TOOLS
The latest versions of Microchip’s software tools have
been designed to fully support the extended instruction
set of the PIC18FXX90 family of devices. This includes
the MPLAB C18 C compiler, MPASM assembly lan-
guage and MPLAB Integrated Development
Environment (IDE).
When selecting a target device for software develop-
ment, MPLAB IDE will automatically set default config-
uration bits for that device. The default setting for the
XINST configuration bit is ‘0’, disabling the extended
instruction set and Indexed Literal Offset Addressing
mode. For proper execution of applications developed
to take advantage of the extended instruction set,
XINST must be set during programming.
To develop software for the extended instruction set,
the user must enable support for the instructions and
the Indexed Addressing mode in their language tool(s).
Depending on the environment being used, this may be
done in several ways:
• A menu option, or dialog box within the
environment, that allows the user to configure the
language tool and its settings for the project
• A command line option
• A directive in the source code
These options vary between different compilers,
assemblers and development environments. Users are
encouraged to review the documentation accompany-
ing their development systems for the appropriate
information.
DS39629B-page 344
Preliminary
 2004 Microchip Technology Inc.