ATMEGA168-20PU Atmel, ATMEGA168-20PU Datasheet - Page 354

• Manufacturer Part Number: ATMEGA168-20PU
• Description: IC AVR MCU 16K 20MHZ 28DIP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA168-20PU

• 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: 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 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-DIP (0.300", 7.62mm)
• Processor Series: ATMEGA16x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Interface Type: 2-Wire, SPI, USART, Serial
• 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
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 6 Channel
• A/d Inputs: 6-Channel, 10-Bit
• Cpu Speed: 20 MIPS
• Eeprom Memory: 512 Bytes
• Input Output: 23
• Interface: I2C/SPI/UART/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 28-pin PDIP
• Programmable Memory: 16K Bytes
• Timers: 2-8-bit, 1-16-bit
• Voltage, Range: 4.5-5.5 V
• Controller Family/series: AVR MEGA
• No. Of I/o's: 23
• Eeprom Memory Size: 512Byte
• Ram Memory Size: 1KB
• Rohs Compliant: Yes
• For Use With: ATSTK600-TQFP32 - STK600 SOCKET/ADAPTER 32-TQFPATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATAVRISP2 - PROGRAMMER AVR IN SYSTEMATJTAGICE2 - AVR ON-CHIP D-BUG SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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10 I/O-Ports .................................................................................................. 64
11 External Interrupts ................................................................................. 83
12 8-bit Timer/Counter0 with PWM ............................................................ 88
13 16-bit Timer/Counter1 with PWM ........................................................ 106
Power Management and Sleep Modes ................................................. 37
System Control and Reset .................................................................... 43
Interrupts ................................................................................................ 54
6.10Timer/Counter Oscillator .......................................................................................34
6.11System Clock Prescaler ........................................................................................34
7.1Idle Mode .................................................................................................................38
7.2ADC Noise Reduction Mode ...................................................................................38
7.3Power-down Mode ..................................................................................................38
7.4Power-save Mode ...................................................................................................38
7.5Standby Mode .........................................................................................................39
7.6Power Reduction Register .......................................................................................39
7.7Minimizing Power Consumption ..............................................................................41
8.1Internal Voltage Reference ......................................................................................48
8.2Watchdog Timer ......................................................................................................49
9.1Interrupt Vectors in ATmega48 ...............................................................................54
9.2Interrupt Vectors in ATmega88 ...............................................................................56
9.3Interrupt Vectors in ATmega168 .............................................................................59
10.1Introduction ............................................................................................................64
10.2Ports as General Digital I/O ...................................................................................65
10.3Alternate Port Functions ........................................................................................69
10.4Register Description for I/O Ports ..........................................................................81
11.1Pin Change Interrupt Timing .................................................................................83
12.1Overview ...............................................................................................................88
12.2Timer/Counter Clock Sources ...............................................................................89
12.3Counter Unit ..........................................................................................................89
12.4Output Compare Unit ............................................................................................90
12.5Compare Match Output Unit ..................................................................................92
12.6Modes of Operation ...............................................................................................93
12.7Timer/Counter Timing Diagrams ...........................................................................97
12.88-bit Timer/Counter Register Description ..............................................................99
2545E–AVR–02/05