AVR Assembler

Preface
1 AVR Assembler Known Issues
2 AVR Assembler Command Line Options
3 Assembler Source
4 AVR Assembler Syntax
5 Assembler Directives
- 5.1 BYTE
  Reserves bytes for a variable.
- 5.2 CSEG
  Code segment.
- 5.3 CSEGSIZE
  Program Memory Size.
- 5.4 DB
  Define constant byte(s) in program memory and EEPROM.
- 5.5 DD
  Define constant double-word(s) in program memory and EEPROM.
- 5.6 DEF
  Set a symbolic name on a register.
- 5.7 DQ
  Define constant quad-word(s) in program memory and EEPROM.
- 5.8 DSEG
  Data Segment.
- 5.9 DW
  Define constant word(s) in program memory and EEPROM.
- 5.10 ELIF and ELSE
  Conditional assembly.
- 5.11 ENDIF
  Conditional assembly.
- 5.12 ENDM and ENDMACRO
  End macro.
- 5.13 EQU
  Set a symbol equal to an expression.
- 5.14 ERROR
  Outputs an error message string.
- 5.15 ESEG
  EEPROM Segment.
- 5.16 EXIT
  Exit this file.
- 5.17 IF, IFDEF, and IFNDEF
  Conditional assembly.
- 5.18 INCLUDE
  Include another file.
- 5.19 LIST
  Turn the listfile generation on.
- 5.20 LISTMAC
  Turn macro expansion on.
- 5.21 MACRO
  Begin macro.
- 5.22 MESSAGE
  Output a message string.
- 5.23 NOLIST
  Turn listfile generation OFF.
- 5.24 ORG
  Set program origin.
- 5.25 OVERLAP and NOOVERLAP
  Set up overlapping section.
- 5.26 SET
  Set a symbol equal to an expression.
- 5.27 UNDEF
  Undefine a register symbolic name.
- 5.28 WARNING
  Outputs a warning message string.
6 Preprocessor
7 Expressions
The Assembler incorporates constant expressions.
8 AVR Instruction Set
9 Revision History
Legal Disclaimer
The Microchip Web Site
Customer Change Notification Service
Customer Support
Microchip Devices Code Protection Feature
Legal Notice
Trademarks
Quality Management System Certified by DNV
Worldwide Sales and Service

5.3 CSEGSIZE

Program Memory Size.

AT94K devices have a user configurable memory partition between the AVR Program memory and the data memory. The program and data SRAM is divided into three blocks: 10K x 16 dedicated program SRAM, 4K x 8 dedicated data SRAM, and 6K x 16 or 12K x 8 configurable SRAM, which may be swapped between program and data memory spaces in 2K x 16 or 4K x 8 partitions. This directive is used to specify the size of the program memory block.

Syntax

.CSEGSIZE = 10 | 12 | 14 | 16

Example

.CSEGSIZE = 12 ; Specifies the program meory size as 12K x 16

The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.