ATMEGA168-20PI Atmel, ATMEGA168-20PI Datasheet - Page 8

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

Specifications of ATMEGA168-20PI

• 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)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

4. Register Summary
2545SS–AVR–07/10
Address
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UBRR0H
UCSR0C
UCSR0B
UCSR0A
UBRR0L
Name
UDR0
UMSEL01
RXCIE0
Bit 7
RXC0
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UMSEL00
TXCIE0
Bit 6
TXC0
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UDRIE0
UDRE0
UPM01
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USART Baud Rate Register Low
UPM00
RXEN0
Bit 4
USART I/O Data Register
FE0
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USBS0
TXEN0
Bit 3
DOR0
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USART Baud Rate Register High
UCSZ01 /UDORD0
UCSZ02
Bit 2
UPE0
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UCSZ00 / UCPHA0
ATmega48/88/168
RXB80
Bit 1
U2X0
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UCPOL0
MPCM0
TXB80
Bit 0
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