ATMEGA323-8AI datasheet, PDF - EEWORLD Datasheet

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ATMEGA323-8AI: DescriptionIC MCU 8BIT 32KB FLASH 44TQFP; Categorysemiconductor The embedded processor and controller; File Size3MB，247 Pages; ManufacturerMicrochip; Websitehttps://www.microchip.com

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ATMEGA323-8AI Overview

IC MCU 8BIT 32KB FLASH 44TQFP

ATMEGA323-8AI Parametric

Parameter Name	Attribute value
core processor	AVR
core size	8-bit
speed	8MHz
Connectivity	I²C，SPI，UART/USART
Peripheral	Undervoltage detection/reset, POR, PWM, WDT
Number of I/Os	32
Program storage capacity	32KB（16K x 16）
Program memory type	flash memory
EEPROM capacity	1K x 8
RAM capacity	2K x 8
Voltage - Power Supply (Vcc/Vdd)	4.5 V ~ 5.5 V
data converter	A/D 8x10b
Oscillator type	internal
Operating temperature	-40°C ~ 85°C
Package/casing	44-TQFP
Supplier device packaging	44-TQFP（10x10）

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Features

•

High-performance, Low-power AVR

8-bit Microcontroller

•

Advanced RISC Architecture

– 130 Powerful Instructions – Most Single-clock Cycle Execution

– 32 x 8 General Purpose Working Registers

– Fully Static Operation

– Up to 8 MIPS Throughput at 8 MHz

– On-chip 2-cycle Multiplier

Non-volatile Program and Data Memories

– 32K Bytes of In-System Self-programmable Flash

Endurance: 1,000 Write/Erase Cycles

– Optional Boot Code Section with Independent Lock Bits

In-System Programming by On-chip Boot Program

– 1K Byte EEPROM

Endurance: 100,000 Write/Erase Cycles

– 2K Bytes Internal SRAM

– Programming Lock for Software Security

JTAG (IEEE Std. 1149.1 Compliant) Interface

– Extensive On-chip Debug Support

– Programming of Flash, EEPROM, Fuses, and Lock Bits through the JTAG Interface

– Boundary-Scan Capabilities According to the JTAG Standard

Peripheral Features

– Two 8-bit Timer/Counters with Separate Prescaler and Compare Mode

– One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture

Mode

– Real Time Counter with Separate Oscillator

– Four PWM Channels

– 8-channel, 10-bit ADC

– Byte-oriented Two-wire Serial Interface

– Programmable Serial USART

– Master/Slave SPI Serial Interface

– Programmable Watchdog Timer with Separate On-chip Oscillator

– On-chip Analog Comparator

Special Microcontroller Features

– Power-on Reset and Programmable Brown-out Detection

– Internal Calibrated RC Oscillator

– External and Internal Interrupt Sources

– Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby

and Extended Standby

I/O and Packages

– 32 Programmable I/O Lines

– 40-pin PDIP and 44-lead TQFP

Operating Voltages

– 2.7 - 5.5V (ATmega323L)

– 4.0 - 5.5V (ATmega323)

Speed Grades

– 0 - 4 MHz (ATmega323L)

– 0 - 8 MHz (ATmega323)

•

8-bit

Microcontroller

with 32K Bytes

of In-System

Programmable

Flash

ATmega323

ATmega323L

Not recommended

for new designs.

Use ATmega32.

•

1457G–AVR–09/03

The AVR core combines a rich instruction set with 32 general purpose working registers.

All the 32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing

two independent registers to be accessed in one single instruction executed in one clock

cycle. The resulting architecture is more code efficient while achieving throughputs up to

ten times faster than conventional CISC microcontrollers.

The ATmega323 provides the following features: 32K bytes of In-System Programmable

Flash, 1K bytes EEPROM, 2K bytes SRAM, 32 general purpose I/O lines, 32 general

purpose working registers, a JTAG interface for Boundary-Scan, On-chip Debugging

support and programming, three flexible Timer/Counters with compare modes, internal

and external interrupts, a serial programmable USART, a byte oriented Two-wire Serial

Interface, an 8-channel, 10-bit ADC, a programmable Watchdog Timer with internal

Oscillator, an SPI serial port, and six software selectable power saving modes. The Idle

mode stops the CPU while allowing the SRAM, Timer/Counters, SPI port, and interrupt

system to continue functioning. The Power-down mode saves the register contents but

freezes the Oscillator, disabling all other chip functions until the next interrupt or Hard-

ware Reset. In Power-save mode, the asynchronous timer continues to run, allowing the

user to maintain a timer base while the rest of the device is sleeping. The ADC Noise

Reduction mode stops the CPU and all I/O modules except asynchronous timer and

ADC, to minimize switching noise during ADC conversions. In Standby mode, the crys-

tal/resonator Oscillator is running while the rest of the device is sleeping. This allows

very fast start-up combined with low-power consumption. In Extended Standby mode,

both the main Oscillator and the asynchronous timer continue to run.

The device is manufactured using Atmel’s high-density non-volatile memory technology.

The On-chip ISP Flash allows the Program memory to be re-programmed In-System

through an SPI serial interface, by a conventional non-volatile memory programmer, or

by an On-chip Boot Program running on the AVR core. The Boot Program can use any

interface to download the application program in the Application Flash memory. By com-

bining an 8-bit RISC CPU with In-System Programmable Flash on a monolithic chip, the

Atmel ATmega323 is a powerful microcontroller that provides a highly flexible and cost

effective solution to many embedded control applications.

The ATmega323 AVR is supported with a full suite of program and system development

tools including: C compilers, macro assemblers, program debugger/simulators, In-Cir-

cuit Emulators, and evaluation kits.

Pin Descriptions

VCC

GND

Port A (PA7..PA0)

Digital supply voltage.

Digital ground.

Port A serves as the analog inputs to the A/D Converter.

Port A also serves as an 8-bit bi-directional I/O port, if the A/D Converter is not used.

Port pins can provide internal pull-up resistors (selected for each bit). The Port A output

buffers can sink 20 mA and can drive LED displays directly. When pins PA0 to PA7 are

used as inputs and are externally pulled low, they will source current if the internal pull-

up resistors are activated. The Port A pins are tri-stated when a reset condition

becomes active, even if the clock is not running.

ATmega323(L)

1457G–AVR–09/03

ATmega323(L)

Port B (PB7..PB0)

Port B is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each

bit). The Port B output buffers can sink 20 mA. As inputs, Port B pins that are externally

pulled low will source current if the pull-up resistors are activated. The Port B pins are

tri-stated when a reset condition becomes active, even if the clock is not running.

Port B also serves the functions of various special features of the ATmega323 as listed

on page 139.

Port C (PC7..PC0)

Port C is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each

bit). The Port C output buffers can sink 20 mA. As inputs, Port C pins that are externally

pulled low will source current if the pull-up resistors are activated. The Port C pins are

tri-stated when a reset condition becomes active, even if the clock is not running.

Port C also serves the functions of the JTAG interface and other special features of the

ATmega323 as listed on page 146. If the JTAG interface is enabled, the pull-up resistors

on pins PC5 (TDI), PC3 (TMS) and PC2 (TCK) will be activated even if a Reset occurs.

Port D (PD7..PD0)

Port D is an 8-bit bidirectional I/O port with internal pull-up resistors (selected for each

bit). The Port D output buffers can sink 20 mA. As inputs, Port D pins that are externally

pulled low will source current if the pull-up resistors are activated. The Port D pins are

tri-stated when a reset condition becomes active, even if the clock is not running.

Port D also serves the functions of various special features of the ATmega323 as listed

on page 151.

RESET

Reset input. A low level on this pin for more than 500 ns will generate a Reset, even if

the clock is not running. Shorter pulses are not guaranteed to generate a Reset.

Input to the inverting Oscillator amplifier and input to the internal clock operating circuit.

Output from the inverting Oscillator amplifier.

AVCC is the supply voltage pin for Port A and the A/D Converter. It should be externally

connected to V

, even if the ADC is not used. If the ADC is used, it should be con-

nected to V

through a low-pass filter. See page 127 for details on operation of the

ADC.

AREF is the analog reference pin for the A/D Converter. For ADC operations, a voltage

in the range 2.56V to AVCC can be applied to this pin.

Analog ground. If the board has a separate analog ground plane, this pin should be con-

nected to this ground plane. Otherwise, connect to GND.

XTAL1

XTAL2

AVCC

AREF

AGND

1457G–AVR–09/03

ATMEGA323-8AI Related Products

	ATMEGA323-8AI	ATMEGA323L-4PC	ATMEGA323L-4PI	ATMEGA323-8AC	ATMEGA323-8PC	ATMEGA323-8PI	ATMEGA323L-4AC	ATMEGA323L-4AI
Description	IC MCU 8BIT 32KB FLASH 44TQFP	IC MCU 8BIT 32KB FLASH 40DIP	IC MCU 8BIT 32KB FLASH 40DIP	IC MCU 8BIT 32KB FLASH 44TQFP	IC MCU 8BIT 32KB FLASH 40DIP	IC MCU 8BIT 32KB FLASH 40DIP	IC MCU 8BIT 32KB FLASH 44TQFP	IC MCU 8BIT 32KB FLASH 44TQFP
core processor	AVR	AVR	AVR	AVR	AVR	AVR	AVR	AVR
core size	8-bit	8-bit	8-bit	8-bit	8-bit	8-bit	8-bit	8-bit
speed	8MHz	4MHz	4MHz	8MHz	8MHz	8MHz	4MHz	4MHz
Connectivity	I²C，SPI，UART/USART	I²C，SPI，UART/USART	I²C，SPI，UART/USART	I²C，SPI，UART/USART	I²C，SPI，UART/USART	I²C，SPI，UART/USART	I²C，SPI，UART/USART	I²C，SPI，UART/USART
Peripheral	Undervoltage detection/reset, POR, PWM, WDT	Undervoltage detection/reset, POR, PWM, WDT	Undervoltage detection/reset, POR, PWM, WDT	Undervoltage detection/reset, POR, PWM, WDT	Undervoltage detection/reset, POR, PWM, WDT	Undervoltage detection/reset, POR, PWM, WDT	Undervoltage detection/reset, POR, PWM, WDT	Undervoltage detection/reset, POR, PWM, WDT
Number of I/Os	32	32	32	32	32	32	32	32
Program storage capacity	32KB（16K x 16）	32KB（16K x 16）	32KB（16K x 16）	32KB（16K x 16）	32KB（16K x 16）	32KB（16K x 16）	32KB（16K x 16）	32KB（16K x 16）
Program memory type	flash memory	flash memory	flash memory	flash memory	flash memory	flash memory	flash memory	flash memory
EEPROM capacity	1K x 8	1K x 8	1K x 8	1K x 8	1K x 8	1K x 8	1K x 8	1K x 8
RAM capacity	2K x 8	2K x 8	2K x 8	2K x 8	2K x 8	2K x 8	2K x 8	2K x 8
Voltage - Power Supply (Vcc/Vdd)	4.5 V ~ 5.5 V	2.7 V ~ 5.5 V	2.7 V ~ 5.5 V	4.5 V ~ 5.5 V	4.5 V ~ 5.5 V	4.5 V ~ 5.5 V	2.7 V ~ 5.5 V	2.7 V ~ 5.5 V
data converter	A/D 8x10b	A/D 8x10b	A/D 8x10b	A/D 8x10b	A/D 8x10b	A/D 8x10b	A/D 8x10b	A/D 8x10b
Oscillator type	internal	internal	internal	internal	internal	internal	internal	internal
Operating temperature	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Package/casing	44-TQFP	40-DIP（0.600"，15.24mm）	40-DIP（0.600"，15.24mm）	44-TQFP	40-DIP（0.600"，15.24mm）	40-DIP（0.600"，15.24mm）	44-TQFP	44-TQFP
Supplier device packaging	44-TQFP（10x10）	40-PDIP	40-PDIP	44-TQFP（10x10）	40-PDIP	40-PDIP	44-TQFP（10x10）	44-TQFP（10x10）

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