atmega323l ATMEL Corporation, atmega323l Datasheet - Page 162
atmega323l
Manufacturer Part Number
atmega323l
Description
Atmega323 8-bit Avr Microcontroller With 32k Bytes Of In-system Programmable Flash
Manufacturer
ATMEL Corporation
Datasheet
1.ATMEGA323L.pdf
(247 pages)
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On-chip Debug Specific
JTAG Instructions
PRIVATE0; $8
PRIVATE1; $9
PRIVATE2; $A
PRIVATE3; $B
162
ATmega323(L)
mentation and JTAG instructions are therefore irrelevant for the user of the On-chip
Debug system.
The JTAGEN Fuse must be programmed to enable the JTAG Test Access Port. In addi-
tion, the OCDEN Fuse must be programmed and no Lock bits must be set for the On-
chip debug system to work. The disabling of the On-chip debug system when any Lock
bits are set is a security feature. Otherwise, the On-chip debug system would have pro-
vided a back-door into a secured device.
The AVR Studio enables the user to fully control execution of programs on an AVR
device with On-chip Debug capability, AVR In-Circuit Emulator, or the built-in AVR
Instruction Set Simulator. AVR Studio supports source level execution of Assembly pro-
grams assembled with Atmel Corporation’s AVR Assembler and C programs compiled
with 3rd party vendors’ compilers.
AVR Studio runs under Microsoft
For a full description of the AVR Studio, please refer to the AVR Studio User Guide.
Only highlights are presented in this document.
All necessary execution commands are available in AVR Studio, both on source level
and on disassembly level. The user can execute the program, single step through the
code either by tracing into or stepping over functions, step out of functions, place the
cursor on a statement and execute until the statement is reached, stop the execution,
and reset the execution target. In addition, the user can have up to two Data memory
Break Points, alternatively combined as a mask (range) Break Point.
The On-chip debug support is considered being private JTAG instructions, and distrib-
uted within ATMEL and to selected third party vendors only. Instruction opcode listed for
reference.
Private JTAG instruction for accessing On-chip debug system.
Private JTAG instruction for accessing On-chip debug system.
Private JTAG instruction for accessing On-chip debug system.
Private JTAG instruction for accessing On-chip debug system.
®
Windows
®
95/98/2000 and Microsoft Windows NT
1457G–AVR–09/03
®
.
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