ATMEGA329P-20MU Atmel, ATMEGA329P-20MU Datasheet - Page 421

• Manufacturer Part Number: ATMEGA329P-20MU
• Description: IC MCU 32K 4X25 LCD CTRL 64-QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA329P-20MU

• 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-MLF®, 64-QFN
• Processor Series: ATMEGA32x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 2 KB
• Interface Type: SPI, USART, USI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 54
• Number Of Timers: 3
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• For Use With: ATSTK600-TQFP64 - STK600 SOCKET/ADAPTER 64-TQFP770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRISP2 - PROGRAMMER AVR IN SYSTEMATJTAGICE2 - AVR ON-CHIP D-BUG SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ATMEGA329P-16MU; ATMEGA329P-16MU

8021G–AVR–03/11
9
10 System Control and Reset .................................................................... 44
11 Interrupts ................................................................................................ 53
12 External Interrupts ................................................................................. 58
13 I/O-Ports .................................................................................................. 63
Power Management and Sleep Modes ................................................. 37
8.7External Clock .........................................................................................................32
8.8Clock Output Buffer .................................................................................................33
8.9Timer/Counter Oscillator .........................................................................................33
8.10System Clock Prescaler ........................................................................................33
8.11Register Description ..............................................................................................35
9.1Overview .................................................................................................................37
9.2Sleep Modes ...........................................................................................................37
9.3BOD Disable ............................................................................................................38
9.4Idle Mode .................................................................................................................38
9.5ADC Noise Reduction Mode ...................................................................................38
9.6Power-down Mode ..................................................................................................38
9.7Power-save Mode ...................................................................................................39
9.8Standby Mode .........................................................................................................39
9.9Power Reduction Register .......................................................................................39
9.10Minimizing Power Consumption ............................................................................40
9.11Register Description ..............................................................................................42
10.1Resetting the AVR .................................................................................................44
10.2Reset Sources .......................................................................................................44
10.3Internal Voltage Reference ....................................................................................48
10.4Watchdog Timer ....................................................................................................48
10.5Register Description ..............................................................................................50
11.1Overview ...............................................................................................................53
11.2Interrupt Vectors ....................................................................................................53
11.3Register Description ..............................................................................................57
12.1Overview ...............................................................................................................58
12.2Pin Change Interrupt Timing .................................................................................59
12.3Register Description ..............................................................................................59
13.1Overview ...............................................................................................................63
13.2Ports as General Digital I/O ...................................................................................64
ATmega329P/3290P
ii