Atmel CAVR-4 사용자 설명서

CAVR-4

Basic settings for project configuration

Reference Guide

Both options set up default behavior—implicit assumptions—but note that the 

--cpu

 

option is more precise because it contains more information about the intended target 
than the more generic 

-v

 option. The 

--cpu

 option knows, for example, how much flash 

memory is available in the given target and allows the compiler to optimize accesses to 
code memory in a way that the 

-v

 option does not. See Mapping of processor options 

The 

--cpu=derivative

 option implicitly sets up all internal compiler settings needed 

to generate code for the processor variant you are using. The following options are 
implicitly controlled when you use the 

--cpu

 option: 

--eecr_address

, 

--eeprom_size

, 

--enhanced_core

, 

--spmcr_address

, 

-v

 and 

--64k_flash

.

Because these options are automatically set when you use the 

--cpu

 option, you cannot 

set them explicitly. For information about implicit assumptions when using the 

-v

 

option, see Summary of processor configuration, page 8. To read more about the 
generated code, see -v, page 197.

See the AVR® IAR Embedded Workbench™ IDE User Guide for information about 
setting project options in IAR Embedded Workbench.

Use the 

--cpu

 or 

-v

 option to specify the AVR derivative; see the chapter Compiler 

options for syntax information. 

The following table shows the mapping of processor options and which AVR 
microcontrollers they support:

--cpu=1200

-v0

AT90S1200

--cpu=2313

-v0

AT90S2313

--cpu=2323

-v0

AT90S2323

--cpu=2333

-v0

AT90S2333

--cpu=2343

-v0

AT90S2343

--cpu=4414

-v1

AT90S4414 

--cpu=4433

-v0

AT90S4433

--cpu=4434

-v1

AT90S4434 

--cpu=8515

-v1

AT90S8515

--cpu=8534

-v1

AT90S8534

--cpu=8535

-v1

AT90S8535