ATMEGA164P-20MCU Atmel, ATMEGA164P-20MCU Datasheet - Page 431

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

Specifications of ATMEGA164P-20MCU

• 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-VQFN Exposed Pad
• For Use With: ATSTK600-TQFP44 - STK600 SOCKET/ADAPTER 44-TQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table of Contents
8011O–AVR–07/10
1
2
3
4
5
6
Features ..................................................................................................... 1
Pin Configurations ................................................................................... 2
Overview ................................................................................................... 4
About ......................................................................................................... 8
AVR CPU Core .......................................................................................... 9
AVR Memories ........................................................................................ 18
System Clock and Clock Options ......................................................... 29
1.1 Pinout - PDIP/TQFP/VQFN/QFN/MLF .....................................................................2
1.2 Pinout - DRQFN .......................................................................................................3
2.1 Block Diagram ..........................................................................................................4
2.2 Comparison Between ATmega164P, ATmega324P and ATmega644P ..................5
2.3 Pin Descriptions .......................................................................................................6
3.1 Resources ................................................................................................................8
3.2 About Code Examples ..............................................................................................8
3.3 Data Retention .........................................................................................................8
4.1 Overview ..................................................................................................................9
4.2 ALU – Arithmetic Logic Unit ...................................................................................10
4.3 Status Register .......................................................................................................10
4.4 General Purpose Register File ...............................................................................12
4.5 Stack Pointer ..........................................................................................................13
4.6 Instruction Execution Timing ..................................................................................14
4.7 Reset and Interrupt Handling .................................................................................15
5.1 Overview ................................................................................................................18
5.2 In-System Reprogrammable Flash Program Memory ............................................18
5.3 SRAM Data Memory ..............................................................................................19
5.4 EEPROM Data Memory .........................................................................................21
5.5 I/O Memory .............................................................................................................22
5.6 Register Description ...............................................................................................23
6.1 Clock Systems and their Distribution ......................................................................29
6.2 Clock Sources ........................................................................................................30
6.3 Low Power Crystal Oscillator ..................................................................................32
6.4 Full Swing Crystal Oscillator ...................................................................................33
ATmega164P/324P/644P
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