ATMEGA325-16AI Atmel, ATMEGA325-16AI Datasheet - Page 5
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ATMEGA325-16AI
Manufacturer Part Number
ATMEGA325-16AI
Description
IC AVR MCU 32K 16MHZ 64TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA325-16AI
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
SPI, UART/USART, USI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
54
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
64-TQFP, 64-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATMEGA325-16AI
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
2.2
2570MS–AVR–04/11
Comparison between ATmega325, ATmega3250, ATmega645 and ATmega6450
resulting architecture is more code efficient while achieving throughputs up to ten times faster
than conventional CISC microcontrollers.
The Atmel ATmega325/3250/645/6450 provides the following features: 32/64K bytes of In-Sys-
tem Programmable Flash with Read-While-Write capabilities, 1/2K bytes EEPROM, 2/4K byte
SRAM, 54/69 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, Universal
Serial Interface with Start Condition Detector, an 8-channel, 10-bit ADC, a programmable
Watchdog Timer with internal Oscillator, an SPI serial port, and five 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
hardware reset. In Power-save mode, the asynchronous timer will continue 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 crystal/resonator Oscillator is
running while the rest of the device is sleeping. This allows very fast start-up combined with low-
power consumption.
The device is manufactured using Atmel’s high density non-volatile memory technology. The
On-chip In-System re-Programmable (ISP) Flash allows the program memory to be repro-
grammed 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. Soft-
ware in the Boot Flash section will continue to run while the Application Flash section is updated,
providing true Read-While-Write operation. By combining an 8-bit RISC CPU with In-System
Self-Programmable Flash on a monolithic chip, the Atmel Atmel ATmega325/3250/645/6450 is a
powerful microcontroller that provides a highly flexible and cost effective solution to many
embedded control applications.
The Atmel ATmega325/3250/645/6450 AVR is supported with a full suite of program and system
development tools including: C Compilers, Macro Assemblers, Program Debugger/Simulators,
In-Circuit Emulators, and Evaluation kits.
The ATmega325, ATmega3250, ATmega645, and ATmega6450 differs only in memory sizes,
pin count and pinout.
devices.
Table 2-1.
Device
ATmega325
ATmega3250
ATmega645
ATmega6450
Configuration Summary
Flash
32Kbytes
32Kbytes
64Kbytes
64Kbytes
Table 3-1 on page 5
EEPROM
1Kbytes
1Kbytes
2Kbytes
2Kbytes
summarizes the different configurations for the four
ATmega325/3250/645/6450
RAM
2Kbytes
2Kbytes
4Kbytes
4Kbytes
General Purpose
I/O Pins
54
69
54
69
5