ATMEGA88-20PU Atmel, ATMEGA88-20PU Datasheet - Page 369

• Manufacturer Part Number: ATMEGA88-20PU
• Description: IC AVR MCU 8K 20MHZ 5V 28DIP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA88-20PU

• 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: 23
• Program Memory Size: 8KB (4K 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 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-DIP (0.300", 7.62mm)
• Cpu Family: ATmega
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 20MHz
• Interface Type: SPI/TWI/USART
• Total Internal Ram Size: 1KB
• # I/os (max): 23
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 6-chx10-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Pin Count: 28
• Package Type: PDIP
• Processor Series: ATMEGA8x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 23
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, ATAVRTS2080A, ATASTK512-EK1-IND
• Minimum Operating Temperature: - 40 C
• Package: 28PDIP
• Family Name: ATmega
• Maximum Speed: 20 MHz
• For Use With: ATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATAVRISP2 - PROGRAMMER AVR IN SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table of Contents
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2545S–AVR–07/10
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 ATmega48, ATmega88, and ATmega168 .............................6
6.1Overview ....................................................................................................................8
6.2Architectural Overview ...............................................................................................8
6.3ALU – Arithmetic Logic Unit .......................................................................................9
6.4Status Register ........................................................................................................10
6.5General Purpose Register File ................................................................................11
6.6Stack Pointer ...........................................................................................................12
6.7Instruction Execution Timing ...................................................................................13
6.8Reset 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 .............................................................................32
ATmega48/88/168
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