ATMEGA164P-20AQ Atmel, ATMEGA164P-20AQ Datasheet - Page 432

• Manufacturer Part Number: ATMEGA164P-20AQ
• Description: MCU AVR 16K FLASH 20MHZ 44-TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA164P-20AQ

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K 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
• For Use With: ATSTK600-TQFP44 - STK600 SOCKET/ADAPTER 44-TQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8011O–AVR–07/10
7
8
9
Power Management and Sleep Modes ................................................. 42
System Control and Reset .................................................................... 50
Interrupts ................................................................................................ 61
6.5 Low Frequency Crystal Oscillator ...........................................................................34
6.6 Calibrated Internal RC Oscillator ............................................................................36
6.7 128 kHz Internal Oscillator .....................................................................................37
6.8 External Clock ........................................................................................................37
6.9 Timer/Counter Oscillator ........................................................................................38
6.10 Clock Output Buffer ..............................................................................................38
6.11 System Clock Prescaler .......................................................................................38
6.12 Register Description .............................................................................................40
7.1 Overview ................................................................................................................42
7.2 Sleep Modes ..........................................................................................................42
7.3 BOD Disable ...........................................................................................................43
7.4 Idle Mode ................................................................................................................43
7.5 ADC Noise Reduction Mode ..................................................................................43
7.6 Power-down Mode .................................................................................................44
7.7 Power-save Mode ..................................................................................................44
7.8 Standby Mode ........................................................................................................44
7.9 Extended Standby Mode ........................................................................................44
7.10 Power Reduction Register ....................................................................................45
7.11 Minimizing Power Consumption ...........................................................................45
7.12 Register Description .............................................................................................47
8.1 Resetting the AVR ..................................................................................................50
8.2 Reset Sources ........................................................................................................50
8.3 Power-on Reset ......................................................................................................51
8.4 External Reset ........................................................................................................52
8.5 Brown-out Detection ...............................................................................................53
8.6 Watchdog Reset .....................................................................................................53
8.7 Internal Voltage Reference .....................................................................................54
8.8 Watchdog Timer .....................................................................................................55
8.9 Register Description ...............................................................................................58
9.1 Overview ................................................................................................................61
9.2 Interrupt Vectors in ATmega164P/324P/644P .......................................................61
9.3 Register Description ...............................................................................................65
ATmega164P/324P/644P
ii