ATMEGA168PA-PU Atmel, ATMEGA168PA-PU Datasheet - Page 558

• Manufacturer Part Number: ATMEGA168PA-PU
• Description: MCU, 8BIT, AVR, 16K FLASH, 28PDIP
• Manufacturer: Atmel

Specifications of ATMEGA168PA-PU

• Controller Family/series: Atmega
• No. Of I/o's: 23
• Eeprom Memory Size: 512Byte
• Ram Memory Size: 1KB
• Cpu Speed: 20MHz
• No.: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 16KB
• Oscillator Type: External, Internal
• Rohs Compliant: Yes

Table of Contents
8271C–AVR–08/10
1
2
3
4
5
6
7
8
ATmega48A/48PA/88A/88PA/168A/168PA/328/328
Features ..................................................................................................... 1
Pin Configurations ................................................................................... 2
Overview ................................................................................................... 5
Resources ................................................................................................. 7
Data Retention .......................................................................................... 7
About Code Examples ............................................................................. 7
AVR CPU Core .......................................................................................... 8
AVR Memories ........................................................................................ 16
System Clock and Clock Options ......................................................... 26
1.1Pin Descriptions ........................................................................................................3
2.1Block Diagram ...........................................................................................................5
2.2Comparison Between Processors .............................................................................6
6.1Overview ...................................................................................................................8
6.2ALU – Arithmetic Logic Unit ......................................................................................9
6.3Status Register ..........................................................................................................9
6.4General Purpose Register File ................................................................................11
6.5Stack Pointer ...........................................................................................................12
6.6Instruction Execution Timing ...................................................................................13
6.7Reset and Interrupt Handling ..................................................................................14
7.1Overview .................................................................................................................16
7.2In-System Reprogrammable Flash Program Memory .............................................16
7.3SRAM Data Memory ...............................................................................................18
7.4EEPROM Data Memory ..........................................................................................19
7.5I/O Memory ..............................................................................................................20
7.6Register Description ................................................................................................21
8.1Clock Systems and their Distribution .......................................................................26
8.2Clock Sources .........................................................................................................27
8.3Low Power Crystal Oscillator ...................................................................................28
8.4Full Swing Crystal Oscillator ....................................................................................30
8.5Low Frequency Crystal Oscillator ............................................................................32
8.6Calibrated Internal RC Oscillator .............................................................................33
8.7128 kHz Internal Oscillator ......................................................................................34
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