ATMEGA168-20AI Atmel, ATMEGA168-20AI Datasheet - Page 301

• Manufacturer Part Number: ATMEGA168-20AI
• Description: IC AVR MCU 16K 20MHZ 32TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA168-20AI

• 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 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFP, 32-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

27.8.4
2545S–AVR–07/10
SPI Serial Programming Characteristics
Figure 27-9. Serial Programming Waveforms
For characteristics of the SPI module see “SPI Timing Characteristics” on page 308.
SERIAL DATA OUTPUT
SERIAL CLOCK INPUT
SERIAL DATA INPUT
SAMPLE
(MOSI)
(MISO)
(SCK)
MSB
MSB
ATmega48/88/168
LSB
LSB
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