ATMEGA168-20PU Atmel, ATMEGA168-20PU Datasheet - Page 81

• 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

10.4
10.4.1
10.4.2
10.4.3
10.4.4
10.4.5
10.4.6
10.4.7
10.4.8
2545E–AVR–02/05
Register Description for I/O Ports
The Port B Data Register – PORTB
The Port B Data Direction Register – DDRB
The Port B Input Pins Address – PINB
The Port C Data Register – PORTC
The Port C Data Direction Register – DDRC
The Port C Input Pins Address – PINC
The Port D Data Register – PORTD
The Port D Data Direction Register – DDRD
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
PORTB7
PORTD7
PINB7
DDB7
DDD7
R/W
R/W
R/W
R/W
N/A
R
R
R
R
7
0
7
0
7
7
–
0
7
–
0
7
–
0
7
0
7
0
PORTB6
PORTC6
PORTD6
PINB6
PINC6
DDB6
DDC6
DDD6
R/W
R/W
R/W
R/W
R/W
R/W
N/A
N/A
R
R
6
0
6
0
6
6
0
6
0
6
6
0
6
0
PORTB5
PORTC5
PORTD5
PINB5
PINC5
DDB5
DDC5
DDD5
R/W
R/W
R/W
R/W
R/W
R/W
N/A
N/A
R
R
5
0
5
0
5
5
0
5
0
5
5
0
5
0
PORTB4
PORTC4
PORTD4
PINB4
PINC4
DDB4
DDC4
DDD4
R/W
R/W
R/W
R/W
R/W
R/W
N/A
N/A
R
R
4
0
4
0
4
4
0
4
0
4
4
0
4
0
PORTB3
PORTC3
PORTD3
PINB3
PINC3
DDB3
DDC3
DDD3
R/W
R/W
R/W
R/W
R/W
R/W
N/A
N/A
R
R
3
0
3
0
3
3
0
3
0
3
3
0
3
0
PORTB2
PORTC2
PORTD2
PINB2
PINC2
DDB2
DDC2
DDD2
R/W
R/W
R/W
R/W
R/W
R/W
ATmega48/88/168
N/A
N/A
R
R
2
0
2
0
2
2
0
2
0
2
2
0
2
0
PORTB1
PORTC1
PORTD1
PINB1
PINC1
DDB1
DDC1
DDD1
R/W
R/W
R/W
R/W
R/W
R/W
N/A
N/A
R
R
1
0
1
0
1
1
0
1
0
1
1
0
1
0
PORTB0
PORTC0
PORTD0
PINB0
PINC0
DDB0
DDC0
DDD0
R/W
R/W
R/W
R/W
R/W
R/W
N/A
N/A
R
R
0
0
0
0
0
0
0
0
0
0
0
0
0
0
PORTB
PORTC
PORTD
DDRB
DDRC
DDRD
PINB
PINC
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