ATMEGA323L-4AI Atmel, ATMEGA323L-4AI Datasheet - Page 8
ATMEGA323L-4AI
Manufacturer Part Number
ATMEGA323L-4AI
Description
IC AVR MCU 32K LV 4MZ IND 44TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA323L-4PC.pdf
(247 pages)
Specifications of ATMEGA323L-4AI
Core Processor
AVR
Core Size
8-Bit
Speed
4MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
32
Program Memory Size
32KB (16K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-TQFP, 44-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
ATMEGA323L4AI
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Architectural
Overview
8
ATmega323(L)
The fast-access Register File concept contains 32 x 8-bit general purpose working reg-
isters with a single clock cycle access time. This means that during one single clock
cycle, one Arithmetic Logic Unit (ALU) operation is executed. Two operands are output
from the Register File, the operation is executed, and the result is stored back in the
Register File
Six of the 32 registers can be used as three 16-bits indirect address register pointers for
Data Space addressing – enabling efficient address calculations. One of the three
address pointers is also used as the address pointer for look up tables in Flash Program
memory. These added function registers are the 16-bits X-, Y-, and Z-register.
The ALU supports arithmetic and logic operations between registers or between a con-
stant and a register. Single register operations are also executed in the ALU. Figure 5
shows the ATmega323 AVR Enhanced RISC microcontroller architecture.
In addition to the register operation, the conventional memory addressing modes can be
used on the Register File as well. This is enabled by the fact that the Register File is
assigned the 32 lowest Data Space addresses ($00 - $1F), allowing them to be
accessed as though they were ordinary memory locations.
The I/O Memory space contains 64 addresses for CPU peripheral functions as Control
Registers, Timer/Counters, A/D Converters, and other I/O functions. The I/O Memory
can be accessed directly, or as the Data Space locations following those of the Register
File, $20 - $5F.
–
in one clock cycle.
1457G–AVR–09/03
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