ATMEGA329P-20AN Atmel, ATMEGA329P-20AN Datasheet - Page 5

• Manufacturer Part Number: ATMEGA329P-20AN
• Description: IC MCU AVR 32K 20MHZ 64TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA329P-20AN

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, LCD, 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: Lead free / RoHS Compliant

2.2
8021GS–AVR–03/11
Comparison between ATmega329P, and ATmega3290P.
resulting architecture is more code efficient while achieving throughputs up to ten times faster
than conventional CISC microcontrollers.
The ATmel
Programmable Flash with Read-While-Write capabilities, 1Kbytes EEPROM, 2Kbyte 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, a complete On-chip LCD con-
troller with internal contrast control, 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 con-
tinue 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 and the LCD controller continues to run, allowing the user to maintain a
timer base and operate the LCD display while the rest of the device is sleeping. The ADC Noise
Reduction mode stops the CPU and all I/O modules except asynchronous timer, LCD controller
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.
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 ATmega329P/3290P is a powerful
microcontroller that provides a highly flexible and cost effective solution to many embedded con-
trol applications.
The ATmega329P/3290P AVR is supported with a full suite of program and system develop-
ment tools including: C Compilers, Macro Assemblers, Program Debugger/Simulators, In-Circuit
Emulators, and Evaluation kits.
The ATmega329P, and ATmega3290P differ only in pin count and pinout.
summarizes the different configurations for the four devices.
Table 2-1.
Device
ATmega329P
ATmega3290P
®
AVR
Configuration Summary
®
Flash
32Kbytes
32Kbytes
ATmega329P/3290P provides the following features: 32K bytes of In-System
EEPROM
1Kbytes
1Kbytes
RAM
2Kbytes
2Kbytes
ATmega329P/3290P
LCD
Segments
4 x 25
4 x 40
Table 2-1 on page 5
General Purpose
I/O Pins
54
69
5